diff --git a/commonfile/fileblockstore/fileblockstore.go b/commonfile/fileblockstore/fileblockstore.go
index 3f2e33af..99c89b20 100644
--- a/commonfile/fileblockstore/fileblockstore.go
+++ b/commonfile/fileblockstore/fileblockstore.go
@@ -21,6 +21,7 @@ type ctxKey uint
 
 const (
 	ctxKeySpaceId ctxKey = iota
+	ctxKeyFileId
 )
 
 type BlockStore interface {
@@ -48,3 +49,12 @@ func CtxGetSpaceId(ctx context.Context) (spaceId string) {
 	spaceId, _ = ctx.Value(ctxKeySpaceId).(string)
 	return
 }
+
+func CtxWithFileId(ctx context.Context, spaceId string) context.Context {
+	return context.WithValue(ctx, ctxKeyFileId, spaceId)
+}
+
+func CtxGetFileId(ctx context.Context) (spaceId string) {
+	spaceId, _ = ctx.Value(ctxKeyFileId).(string)
+	return
+}
diff --git a/commonfile/fileproto/file.pb.go b/commonfile/fileproto/file.pb.go
index f0b84530..2f409c6b 100644
--- a/commonfile/fileproto/file.pb.go
+++ b/commonfile/fileproto/file.pb.go
@@ -27,18 +27,21 @@ type ErrCodes int32
 const (
 	ErrCodes_Unexpected  ErrCodes = 0
 	ErrCodes_CIDNotFound ErrCodes = 1
+	ErrCodes_Forbidden   ErrCodes = 2
 	ErrCodes_ErrorOffset ErrCodes = 200
 )
 
 var ErrCodes_name = map[int32]string{
 	0:   "Unexpected",
 	1:   "CIDNotFound",
+	2:   "Forbidden",
 	200: "ErrorOffset",
 }
 
 var ErrCodes_value = map[string]int32{
 	"Unexpected":  0,
 	"CIDNotFound": 1,
+	"Forbidden":   2,
 	"ErrorOffset": 200,
 }
 
@@ -184,8 +187,9 @@ func (m *BlockGetResponse) GetData() []byte {
 
 type BlockPushRequest struct {
 	SpaceId string `protobuf:"bytes,1,opt,name=spaceId,proto3" json:"spaceId,omitempty"`
-	Cid     []byte `protobuf:"bytes,2,opt,name=cid,proto3" json:"cid,omitempty"`
-	Data    []byte `protobuf:"bytes,3,opt,name=data,proto3" json:"data,omitempty"`
+	FileId  string `protobuf:"bytes,2,opt,name=fileId,proto3" json:"fileId,omitempty"`
+	Cid     []byte `protobuf:"bytes,3,opt,name=cid,proto3" json:"cid,omitempty"`
+	Data    []byte `protobuf:"bytes,4,opt,name=data,proto3" json:"data,omitempty"`
 }
 
 func (m *BlockPushRequest) Reset()         { *m = BlockPushRequest{} }
@@ -228,6 +232,13 @@ func (m *BlockPushRequest) GetSpaceId() string {
 	return ""
 }
 
+func (m *BlockPushRequest) GetFileId() string {
+	if m != nil {
+		return m.FileId
+	}
+	return ""
+}
+
 func (m *BlockPushRequest) GetCid() []byte {
 	if m != nil {
 		return m.Cid
@@ -516,7 +527,8 @@ func (m *BlockAvailability) GetStatus() AvailabilityStatus {
 
 type BlocksBindRequest struct {
 	SpaceId string   `protobuf:"bytes,1,opt,name=spaceId,proto3" json:"spaceId,omitempty"`
-	Cids    [][]byte `protobuf:"bytes,2,rep,name=cids,proto3" json:"cids,omitempty"`
+	FileId  string   `protobuf:"bytes,2,opt,name=fileId,proto3" json:"fileId,omitempty"`
+	Cids    [][]byte `protobuf:"bytes,3,rep,name=cids,proto3" json:"cids,omitempty"`
 }
 
 func (m *BlocksBindRequest) Reset()         { *m = BlocksBindRequest{} }
@@ -559,6 +571,13 @@ func (m *BlocksBindRequest) GetSpaceId() string {
 	return ""
 }
 
+func (m *BlocksBindRequest) GetFileId() string {
+	if m != nil {
+		return m.FileId
+	}
+	return ""
+}
+
 func (m *BlocksBindRequest) GetCids() [][]byte {
 	if m != nil {
 		return m.Cids
@@ -602,6 +621,250 @@ func (m *BlocksBindResponse) XXX_DiscardUnknown() {
 
 var xxx_messageInfo_BlocksBindResponse proto.InternalMessageInfo
 
+type FilesDeleteRequest struct {
+	SpaceId string   `protobuf:"bytes,1,opt,name=spaceId,proto3" json:"spaceId,omitempty"`
+	FileIds []string `protobuf:"bytes,2,rep,name=fileIds,proto3" json:"fileIds,omitempty"`
+}
+
+func (m *FilesDeleteRequest) Reset()         { *m = FilesDeleteRequest{} }
+func (m *FilesDeleteRequest) String() string { return proto.CompactTextString(m) }
+func (*FilesDeleteRequest) ProtoMessage()    {}
+func (*FilesDeleteRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_fd665a7e11c833d5, []int{11}
+}
+func (m *FilesDeleteRequest) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *FilesDeleteRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_FilesDeleteRequest.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *FilesDeleteRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FilesDeleteRequest.Merge(m, src)
+}
+func (m *FilesDeleteRequest) XXX_Size() int {
+	return m.Size()
+}
+func (m *FilesDeleteRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_FilesDeleteRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FilesDeleteRequest proto.InternalMessageInfo
+
+func (m *FilesDeleteRequest) GetSpaceId() string {
+	if m != nil {
+		return m.SpaceId
+	}
+	return ""
+}
+
+func (m *FilesDeleteRequest) GetFileIds() []string {
+	if m != nil {
+		return m.FileIds
+	}
+	return nil
+}
+
+type FilesDeleteResponse struct {
+}
+
+func (m *FilesDeleteResponse) Reset()         { *m = FilesDeleteResponse{} }
+func (m *FilesDeleteResponse) String() string { return proto.CompactTextString(m) }
+func (*FilesDeleteResponse) ProtoMessage()    {}
+func (*FilesDeleteResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_fd665a7e11c833d5, []int{12}
+}
+func (m *FilesDeleteResponse) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *FilesDeleteResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_FilesDeleteResponse.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *FilesDeleteResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FilesDeleteResponse.Merge(m, src)
+}
+func (m *FilesDeleteResponse) XXX_Size() int {
+	return m.Size()
+}
+func (m *FilesDeleteResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_FilesDeleteResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FilesDeleteResponse proto.InternalMessageInfo
+
+type FilesInfoRequest struct {
+	SpaceId string   `protobuf:"bytes,1,opt,name=spaceId,proto3" json:"spaceId,omitempty"`
+	FileIds []string `protobuf:"bytes,2,rep,name=fileIds,proto3" json:"fileIds,omitempty"`
+}
+
+func (m *FilesInfoRequest) Reset()         { *m = FilesInfoRequest{} }
+func (m *FilesInfoRequest) String() string { return proto.CompactTextString(m) }
+func (*FilesInfoRequest) ProtoMessage()    {}
+func (*FilesInfoRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_fd665a7e11c833d5, []int{13}
+}
+func (m *FilesInfoRequest) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *FilesInfoRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_FilesInfoRequest.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *FilesInfoRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FilesInfoRequest.Merge(m, src)
+}
+func (m *FilesInfoRequest) XXX_Size() int {
+	return m.Size()
+}
+func (m *FilesInfoRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_FilesInfoRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FilesInfoRequest proto.InternalMessageInfo
+
+func (m *FilesInfoRequest) GetSpaceId() string {
+	if m != nil {
+		return m.SpaceId
+	}
+	return ""
+}
+
+func (m *FilesInfoRequest) GetFileIds() []string {
+	if m != nil {
+		return m.FileIds
+	}
+	return nil
+}
+
+type FilesInfoResponse struct {
+	FilesInfo []*FileInfo `protobuf:"bytes,1,rep,name=filesInfo,proto3" json:"filesInfo,omitempty"`
+}
+
+func (m *FilesInfoResponse) Reset()         { *m = FilesInfoResponse{} }
+func (m *FilesInfoResponse) String() string { return proto.CompactTextString(m) }
+func (*FilesInfoResponse) ProtoMessage()    {}
+func (*FilesInfoResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_fd665a7e11c833d5, []int{14}
+}
+func (m *FilesInfoResponse) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *FilesInfoResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_FilesInfoResponse.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *FilesInfoResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FilesInfoResponse.Merge(m, src)
+}
+func (m *FilesInfoResponse) XXX_Size() int {
+	return m.Size()
+}
+func (m *FilesInfoResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_FilesInfoResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FilesInfoResponse proto.InternalMessageInfo
+
+func (m *FilesInfoResponse) GetFilesInfo() []*FileInfo {
+	if m != nil {
+		return m.FilesInfo
+	}
+	return nil
+}
+
+type FileInfo struct {
+	FileId     string `protobuf:"bytes,1,opt,name=fileId,proto3" json:"fileId,omitempty"`
+	UsageBytes uint64 `protobuf:"varint,2,opt,name=usageBytes,proto3" json:"usageBytes,omitempty"`
+	CidsCount  uint32 `protobuf:"varint,3,opt,name=cidsCount,proto3" json:"cidsCount,omitempty"`
+}
+
+func (m *FileInfo) Reset()         { *m = FileInfo{} }
+func (m *FileInfo) String() string { return proto.CompactTextString(m) }
+func (*FileInfo) ProtoMessage()    {}
+func (*FileInfo) Descriptor() ([]byte, []int) {
+	return fileDescriptor_fd665a7e11c833d5, []int{15}
+}
+func (m *FileInfo) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *FileInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_FileInfo.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *FileInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_FileInfo.Merge(m, src)
+}
+func (m *FileInfo) XXX_Size() int {
+	return m.Size()
+}
+func (m *FileInfo) XXX_DiscardUnknown() {
+	xxx_messageInfo_FileInfo.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_FileInfo proto.InternalMessageInfo
+
+func (m *FileInfo) GetFileId() string {
+	if m != nil {
+		return m.FileId
+	}
+	return ""
+}
+
+func (m *FileInfo) GetUsageBytes() uint64 {
+	if m != nil {
+		return m.UsageBytes
+	}
+	return 0
+}
+
+func (m *FileInfo) GetCidsCount() uint32 {
+	if m != nil {
+		return m.CidsCount
+	}
+	return 0
+}
+
 type CheckRequest struct {
 }
 
@@ -609,7 +872,7 @@ func (m *CheckRequest) Reset()         { *m = CheckRequest{} }
 func (m *CheckRequest) String() string { return proto.CompactTextString(m) }
 func (*CheckRequest) ProtoMessage()    {}
 func (*CheckRequest) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fd665a7e11c833d5, []int{11}
+	return fileDescriptor_fd665a7e11c833d5, []int{16}
 }
 func (m *CheckRequest) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -647,7 +910,7 @@ func (m *CheckResponse) Reset()         { *m = CheckResponse{} }
 func (m *CheckResponse) String() string { return proto.CompactTextString(m) }
 func (*CheckResponse) ProtoMessage()    {}
 func (*CheckResponse) Descriptor() ([]byte, []int) {
-	return fileDescriptor_fd665a7e11c833d5, []int{12}
+	return fileDescriptor_fd665a7e11c833d5, []int{17}
 }
 func (m *CheckResponse) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -690,6 +953,118 @@ func (m *CheckResponse) GetAllowWrite() bool {
 	return false
 }
 
+type SpaceInfoRequest struct {
+	SpaceId string `protobuf:"bytes,1,opt,name=spaceId,proto3" json:"spaceId,omitempty"`
+}
+
+func (m *SpaceInfoRequest) Reset()         { *m = SpaceInfoRequest{} }
+func (m *SpaceInfoRequest) String() string { return proto.CompactTextString(m) }
+func (*SpaceInfoRequest) ProtoMessage()    {}
+func (*SpaceInfoRequest) Descriptor() ([]byte, []int) {
+	return fileDescriptor_fd665a7e11c833d5, []int{18}
+}
+func (m *SpaceInfoRequest) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *SpaceInfoRequest) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_SpaceInfoRequest.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *SpaceInfoRequest) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SpaceInfoRequest.Merge(m, src)
+}
+func (m *SpaceInfoRequest) XXX_Size() int {
+	return m.Size()
+}
+func (m *SpaceInfoRequest) XXX_DiscardUnknown() {
+	xxx_messageInfo_SpaceInfoRequest.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SpaceInfoRequest proto.InternalMessageInfo
+
+func (m *SpaceInfoRequest) GetSpaceId() string {
+	if m != nil {
+		return m.SpaceId
+	}
+	return ""
+}
+
+type SpaceInfoResponse struct {
+	LimitBytes uint64 `protobuf:"varint,1,opt,name=limitBytes,proto3" json:"limitBytes,omitempty"`
+	UsageBytes uint64 `protobuf:"varint,2,opt,name=usageBytes,proto3" json:"usageBytes,omitempty"`
+	CidsCount  uint64 `protobuf:"varint,3,opt,name=cidsCount,proto3" json:"cidsCount,omitempty"`
+	FilesCount uint64 `protobuf:"varint,4,opt,name=filesCount,proto3" json:"filesCount,omitempty"`
+}
+
+func (m *SpaceInfoResponse) Reset()         { *m = SpaceInfoResponse{} }
+func (m *SpaceInfoResponse) String() string { return proto.CompactTextString(m) }
+func (*SpaceInfoResponse) ProtoMessage()    {}
+func (*SpaceInfoResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_fd665a7e11c833d5, []int{19}
+}
+func (m *SpaceInfoResponse) XXX_Unmarshal(b []byte) error {
+	return m.Unmarshal(b)
+}
+func (m *SpaceInfoResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	if deterministic {
+		return xxx_messageInfo_SpaceInfoResponse.Marshal(b, m, deterministic)
+	} else {
+		b = b[:cap(b)]
+		n, err := m.MarshalToSizedBuffer(b)
+		if err != nil {
+			return nil, err
+		}
+		return b[:n], nil
+	}
+}
+func (m *SpaceInfoResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_SpaceInfoResponse.Merge(m, src)
+}
+func (m *SpaceInfoResponse) XXX_Size() int {
+	return m.Size()
+}
+func (m *SpaceInfoResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_SpaceInfoResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_SpaceInfoResponse proto.InternalMessageInfo
+
+func (m *SpaceInfoResponse) GetLimitBytes() uint64 {
+	if m != nil {
+		return m.LimitBytes
+	}
+	return 0
+}
+
+func (m *SpaceInfoResponse) GetUsageBytes() uint64 {
+	if m != nil {
+		return m.UsageBytes
+	}
+	return 0
+}
+
+func (m *SpaceInfoResponse) GetCidsCount() uint64 {
+	if m != nil {
+		return m.CidsCount
+	}
+	return 0
+}
+
+func (m *SpaceInfoResponse) GetFilesCount() uint64 {
+	if m != nil {
+		return m.FilesCount
+	}
+	return 0
+}
+
 func init() {
 	proto.RegisterEnum("filesync.ErrCodes", ErrCodes_name, ErrCodes_value)
 	proto.RegisterEnum("filesync.AvailabilityStatus", AvailabilityStatus_name, AvailabilityStatus_value)
@@ -704,8 +1079,15 @@ func init() {
 	proto.RegisterType((*BlockAvailability)(nil), "filesync.BlockAvailability")
 	proto.RegisterType((*BlocksBindRequest)(nil), "filesync.BlocksBindRequest")
 	proto.RegisterType((*BlocksBindResponse)(nil), "filesync.BlocksBindResponse")
+	proto.RegisterType((*FilesDeleteRequest)(nil), "filesync.FilesDeleteRequest")
+	proto.RegisterType((*FilesDeleteResponse)(nil), "filesync.FilesDeleteResponse")
+	proto.RegisterType((*FilesInfoRequest)(nil), "filesync.FilesInfoRequest")
+	proto.RegisterType((*FilesInfoResponse)(nil), "filesync.FilesInfoResponse")
+	proto.RegisterType((*FileInfo)(nil), "filesync.FileInfo")
 	proto.RegisterType((*CheckRequest)(nil), "filesync.CheckRequest")
 	proto.RegisterType((*CheckResponse)(nil), "filesync.CheckResponse")
+	proto.RegisterType((*SpaceInfoRequest)(nil), "filesync.SpaceInfoRequest")
+	proto.RegisterType((*SpaceInfoResponse)(nil), "filesync.SpaceInfoResponse")
 }
 
 func init() {
@@ -713,44 +1095,56 @@ func init() {
 }
 
 var fileDescriptor_fd665a7e11c833d5 = []byte{
-	// 582 bytes of a gzipped FileDescriptorProto
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+	0xcf, 0x2b, 0x43, 0xf9, 0x7a, 0x6d, 0xe4, 0x2e, 0xaf, 0x8d, 0xdc, 0x8f, 0x6b, 0x23, 0xf7, 0x76,
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+	0x07, 0x04, 0x73, 0x08, 0x00, 0x00,
 }
 
 func (m *BlockGetRequest) Marshal() (dAtA []byte, err error) {
@@ -852,13 +1246,20 @@ func (m *BlockPushRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 		copy(dAtA[i:], m.Data)
 		i = encodeVarintFile(dAtA, i, uint64(len(m.Data)))
 		i--
-		dAtA[i] = 0x1a
+		dAtA[i] = 0x22
 	}
 	if len(m.Cid) > 0 {
 		i -= len(m.Cid)
 		copy(dAtA[i:], m.Cid)
 		i = encodeVarintFile(dAtA, i, uint64(len(m.Cid)))
 		i--
+		dAtA[i] = 0x1a
+	}
+	if len(m.FileId) > 0 {
+		i -= len(m.FileId)
+		copy(dAtA[i:], m.FileId)
+		i = encodeVarintFile(dAtA, i, uint64(len(m.FileId)))
+		i--
 		dAtA[i] = 0x12
 	}
 	if len(m.SpaceId) > 0 {
@@ -1093,9 +1494,16 @@ func (m *BlocksBindRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 			copy(dAtA[i:], m.Cids[iNdEx])
 			i = encodeVarintFile(dAtA, i, uint64(len(m.Cids[iNdEx])))
 			i--
-			dAtA[i] = 0x12
+			dAtA[i] = 0x1a
 		}
 	}
+	if len(m.FileId) > 0 {
+		i -= len(m.FileId)
+		copy(dAtA[i:], m.FileId)
+		i = encodeVarintFile(dAtA, i, uint64(len(m.FileId)))
+		i--
+		dAtA[i] = 0x12
+	}
 	if len(m.SpaceId) > 0 {
 		i -= len(m.SpaceId)
 		copy(dAtA[i:], m.SpaceId)
@@ -1129,6 +1537,184 @@ func (m *BlocksBindResponse) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	return len(dAtA) - i, nil
 }
 
+func (m *FilesDeleteRequest) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *FilesDeleteRequest) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *FilesDeleteRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if len(m.FileIds) > 0 {
+		for iNdEx := len(m.FileIds) - 1; iNdEx >= 0; iNdEx-- {
+			i -= len(m.FileIds[iNdEx])
+			copy(dAtA[i:], m.FileIds[iNdEx])
+			i = encodeVarintFile(dAtA, i, uint64(len(m.FileIds[iNdEx])))
+			i--
+			dAtA[i] = 0x12
+		}
+	}
+	if len(m.SpaceId) > 0 {
+		i -= len(m.SpaceId)
+		copy(dAtA[i:], m.SpaceId)
+		i = encodeVarintFile(dAtA, i, uint64(len(m.SpaceId)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
+func (m *FilesDeleteResponse) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *FilesDeleteResponse) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *FilesDeleteResponse) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	return len(dAtA) - i, nil
+}
+
+func (m *FilesInfoRequest) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *FilesInfoRequest) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *FilesInfoRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if len(m.FileIds) > 0 {
+		for iNdEx := len(m.FileIds) - 1; iNdEx >= 0; iNdEx-- {
+			i -= len(m.FileIds[iNdEx])
+			copy(dAtA[i:], m.FileIds[iNdEx])
+			i = encodeVarintFile(dAtA, i, uint64(len(m.FileIds[iNdEx])))
+			i--
+			dAtA[i] = 0x12
+		}
+	}
+	if len(m.SpaceId) > 0 {
+		i -= len(m.SpaceId)
+		copy(dAtA[i:], m.SpaceId)
+		i = encodeVarintFile(dAtA, i, uint64(len(m.SpaceId)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
+func (m *FilesInfoResponse) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *FilesInfoResponse) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *FilesInfoResponse) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if len(m.FilesInfo) > 0 {
+		for iNdEx := len(m.FilesInfo) - 1; iNdEx >= 0; iNdEx-- {
+			{
+				size, err := m.FilesInfo[iNdEx].MarshalToSizedBuffer(dAtA[:i])
+				if err != nil {
+					return 0, err
+				}
+				i -= size
+				i = encodeVarintFile(dAtA, i, uint64(size))
+			}
+			i--
+			dAtA[i] = 0xa
+		}
+	}
+	return len(dAtA) - i, nil
+}
+
+func (m *FileInfo) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *FileInfo) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *FileInfo) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.CidsCount != 0 {
+		i = encodeVarintFile(dAtA, i, uint64(m.CidsCount))
+		i--
+		dAtA[i] = 0x18
+	}
+	if m.UsageBytes != 0 {
+		i = encodeVarintFile(dAtA, i, uint64(m.UsageBytes))
+		i--
+		dAtA[i] = 0x10
+	}
+	if len(m.FileId) > 0 {
+		i -= len(m.FileId)
+		copy(dAtA[i:], m.FileId)
+		i = encodeVarintFile(dAtA, i, uint64(len(m.FileId)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
 func (m *CheckRequest) Marshal() (dAtA []byte, err error) {
 	size := m.Size()
 	dAtA = make([]byte, size)
@@ -1194,6 +1780,79 @@ func (m *CheckResponse) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	return len(dAtA) - i, nil
 }
 
+func (m *SpaceInfoRequest) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *SpaceInfoRequest) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *SpaceInfoRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if len(m.SpaceId) > 0 {
+		i -= len(m.SpaceId)
+		copy(dAtA[i:], m.SpaceId)
+		i = encodeVarintFile(dAtA, i, uint64(len(m.SpaceId)))
+		i--
+		dAtA[i] = 0xa
+	}
+	return len(dAtA) - i, nil
+}
+
+func (m *SpaceInfoResponse) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalToSizedBuffer(dAtA[:size])
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *SpaceInfoResponse) MarshalTo(dAtA []byte) (int, error) {
+	size := m.Size()
+	return m.MarshalToSizedBuffer(dAtA[:size])
+}
+
+func (m *SpaceInfoResponse) MarshalToSizedBuffer(dAtA []byte) (int, error) {
+	i := len(dAtA)
+	_ = i
+	var l int
+	_ = l
+	if m.FilesCount != 0 {
+		i = encodeVarintFile(dAtA, i, uint64(m.FilesCount))
+		i--
+		dAtA[i] = 0x20
+	}
+	if m.CidsCount != 0 {
+		i = encodeVarintFile(dAtA, i, uint64(m.CidsCount))
+		i--
+		dAtA[i] = 0x18
+	}
+	if m.UsageBytes != 0 {
+		i = encodeVarintFile(dAtA, i, uint64(m.UsageBytes))
+		i--
+		dAtA[i] = 0x10
+	}
+	if m.LimitBytes != 0 {
+		i = encodeVarintFile(dAtA, i, uint64(m.LimitBytes))
+		i--
+		dAtA[i] = 0x8
+	}
+	return len(dAtA) - i, nil
+}
+
 func encodeVarintFile(dAtA []byte, offset int, v uint64) int {
 	offset -= sovFile(v)
 	base := offset
@@ -1249,6 +1908,10 @@ func (m *BlockPushRequest) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovFile(uint64(l))
 	}
+	l = len(m.FileId)
+	if l > 0 {
+		n += 1 + l + sovFile(uint64(l))
+	}
 	l = len(m.Cid)
 	if l > 0 {
 		n += 1 + l + sovFile(uint64(l))
@@ -1357,6 +2020,10 @@ func (m *BlocksBindRequest) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovFile(uint64(l))
 	}
+	l = len(m.FileId)
+	if l > 0 {
+		n += 1 + l + sovFile(uint64(l))
+	}
 	if len(m.Cids) > 0 {
 		for _, b := range m.Cids {
 			l = len(b)
@@ -1375,6 +2042,87 @@ func (m *BlocksBindResponse) Size() (n int) {
 	return n
 }
 
+func (m *FilesDeleteRequest) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = len(m.SpaceId)
+	if l > 0 {
+		n += 1 + l + sovFile(uint64(l))
+	}
+	if len(m.FileIds) > 0 {
+		for _, s := range m.FileIds {
+			l = len(s)
+			n += 1 + l + sovFile(uint64(l))
+		}
+	}
+	return n
+}
+
+func (m *FilesDeleteResponse) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	return n
+}
+
+func (m *FilesInfoRequest) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = len(m.SpaceId)
+	if l > 0 {
+		n += 1 + l + sovFile(uint64(l))
+	}
+	if len(m.FileIds) > 0 {
+		for _, s := range m.FileIds {
+			l = len(s)
+			n += 1 + l + sovFile(uint64(l))
+		}
+	}
+	return n
+}
+
+func (m *FilesInfoResponse) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if len(m.FilesInfo) > 0 {
+		for _, e := range m.FilesInfo {
+			l = e.Size()
+			n += 1 + l + sovFile(uint64(l))
+		}
+	}
+	return n
+}
+
+func (m *FileInfo) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = len(m.FileId)
+	if l > 0 {
+		n += 1 + l + sovFile(uint64(l))
+	}
+	if m.UsageBytes != 0 {
+		n += 1 + sovFile(uint64(m.UsageBytes))
+	}
+	if m.CidsCount != 0 {
+		n += 1 + sovFile(uint64(m.CidsCount))
+	}
+	return n
+}
+
 func (m *CheckRequest) Size() (n int) {
 	if m == nil {
 		return 0
@@ -1402,6 +2150,40 @@ func (m *CheckResponse) Size() (n int) {
 	return n
 }
 
+func (m *SpaceInfoRequest) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	l = len(m.SpaceId)
+	if l > 0 {
+		n += 1 + l + sovFile(uint64(l))
+	}
+	return n
+}
+
+func (m *SpaceInfoResponse) Size() (n int) {
+	if m == nil {
+		return 0
+	}
+	var l int
+	_ = l
+	if m.LimitBytes != 0 {
+		n += 1 + sovFile(uint64(m.LimitBytes))
+	}
+	if m.UsageBytes != 0 {
+		n += 1 + sovFile(uint64(m.UsageBytes))
+	}
+	if m.CidsCount != 0 {
+		n += 1 + sovFile(uint64(m.CidsCount))
+	}
+	if m.FilesCount != 0 {
+		n += 1 + sovFile(uint64(m.FilesCount))
+	}
+	return n
+}
+
 func sovFile(x uint64) (n int) {
 	return (math_bits.Len64(x|1) + 6) / 7
 }
@@ -1704,6 +2486,38 @@ func (m *BlockPushRequest) Unmarshal(dAtA []byte) error {
 			m.SpaceId = string(dAtA[iNdEx:postIndex])
 			iNdEx = postIndex
 		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field FileId", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFile
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthFile
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthFile
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.FileId = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 3:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Cid", wireType)
 			}
@@ -1737,7 +2551,7 @@ func (m *BlockPushRequest) Unmarshal(dAtA []byte) error {
 				m.Cid = []byte{}
 			}
 			iNdEx = postIndex
-		case 3:
+		case 4:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Data", wireType)
 			}
@@ -2369,6 +3183,38 @@ func (m *BlocksBindRequest) Unmarshal(dAtA []byte) error {
 			m.SpaceId = string(dAtA[iNdEx:postIndex])
 			iNdEx = postIndex
 		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field FileId", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFile
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthFile
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthFile
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.FileId = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 3:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Cids", wireType)
 			}
@@ -2471,6 +3317,488 @@ func (m *BlocksBindResponse) Unmarshal(dAtA []byte) error {
 	}
 	return nil
 }
+func (m *FilesDeleteRequest) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowFile
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: FilesDeleteRequest: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: FilesDeleteRequest: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field SpaceId", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFile
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthFile
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthFile
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.SpaceId = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field FileIds", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFile
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthFile
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthFile
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.FileIds = append(m.FileIds, string(dAtA[iNdEx:postIndex]))
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipFile(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthFile
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *FilesDeleteResponse) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowFile
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: FilesDeleteResponse: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: FilesDeleteResponse: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		default:
+			iNdEx = preIndex
+			skippy, err := skipFile(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthFile
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *FilesInfoRequest) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowFile
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: FilesInfoRequest: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: FilesInfoRequest: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field SpaceId", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFile
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthFile
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthFile
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.SpaceId = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field FileIds", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFile
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthFile
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthFile
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.FileIds = append(m.FileIds, string(dAtA[iNdEx:postIndex]))
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipFile(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthFile
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *FilesInfoResponse) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowFile
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: FilesInfoResponse: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: FilesInfoResponse: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field FilesInfo", wireType)
+			}
+			var msglen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFile
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				msglen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if msglen < 0 {
+				return ErrInvalidLengthFile
+			}
+			postIndex := iNdEx + msglen
+			if postIndex < 0 {
+				return ErrInvalidLengthFile
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.FilesInfo = append(m.FilesInfo, &FileInfo{})
+			if err := m.FilesInfo[len(m.FilesInfo)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+				return err
+			}
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipFile(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthFile
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *FileInfo) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowFile
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: FileInfo: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: FileInfo: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field FileId", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFile
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthFile
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthFile
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.FileId = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 2:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field UsageBytes", wireType)
+			}
+			m.UsageBytes = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFile
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.UsageBytes |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 3:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field CidsCount", wireType)
+			}
+			m.CidsCount = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFile
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.CidsCount |= uint32(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		default:
+			iNdEx = preIndex
+			skippy, err := skipFile(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthFile
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
 func (m *CheckRequest) Unmarshal(dAtA []byte) error {
 	l := len(dAtA)
 	iNdEx := 0
@@ -2623,6 +3951,214 @@ func (m *CheckResponse) Unmarshal(dAtA []byte) error {
 	}
 	return nil
 }
+func (m *SpaceInfoRequest) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowFile
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: SpaceInfoRequest: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: SpaceInfoRequest: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field SpaceId", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFile
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthFile
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthFile
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.SpaceId = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipFile(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthFile
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *SpaceInfoResponse) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowFile
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= uint64(b&0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: SpaceInfoResponse: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: SpaceInfoResponse: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field LimitBytes", wireType)
+			}
+			m.LimitBytes = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFile
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.LimitBytes |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 2:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field UsageBytes", wireType)
+			}
+			m.UsageBytes = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFile
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.UsageBytes |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 3:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field CidsCount", wireType)
+			}
+			m.CidsCount = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFile
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.CidsCount |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 4:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field FilesCount", wireType)
+			}
+			m.FilesCount = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowFile
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.FilesCount |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		default:
+			iNdEx = preIndex
+			skippy, err := skipFile(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if (skippy < 0) || (iNdEx+skippy) < 0 {
+				return ErrInvalidLengthFile
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
 func skipFile(dAtA []byte) (n int, err error) {
 	l := len(dAtA)
 	iNdEx := 0
diff --git a/commonfile/fileproto/file_drpc.pb.go b/commonfile/fileproto/file_drpc.pb.go
index fcc7d66a..2f9ee69d 100644
--- a/commonfile/fileproto/file_drpc.pb.go
+++ b/commonfile/fileproto/file_drpc.pb.go
@@ -44,8 +44,10 @@ type DRPCFileClient interface {
 	BlockPush(ctx context.Context, in *BlockPushRequest) (*BlockPushResponse, error)
 	BlocksCheck(ctx context.Context, in *BlocksCheckRequest) (*BlocksCheckResponse, error)
 	BlocksBind(ctx context.Context, in *BlocksBindRequest) (*BlocksBindResponse, error)
-	BlocksDelete(ctx context.Context, in *BlocksDeleteRequest) (*BlocksDeleteResponse, error)
+	FilesDelete(ctx context.Context, in *FilesDeleteRequest) (*FilesDeleteResponse, error)
+	FilesInfo(ctx context.Context, in *FilesInfoRequest) (*FilesInfoResponse, error)
 	Check(ctx context.Context, in *CheckRequest) (*CheckResponse, error)
+	SpaceInfo(ctx context.Context, in *SpaceInfoRequest) (*SpaceInfoResponse, error)
 }
 
 type drpcFileClient struct {
@@ -94,9 +96,18 @@ func (c *drpcFileClient) BlocksBind(ctx context.Context, in *BlocksBindRequest)
 	return out, nil
 }
 
-func (c *drpcFileClient) BlocksDelete(ctx context.Context, in *BlocksDeleteRequest) (*BlocksDeleteResponse, error) {
-	out := new(BlocksDeleteResponse)
-	err := c.cc.Invoke(ctx, "/filesync.File/BlocksDelete", drpcEncoding_File_commonfile_fileproto_protos_file_proto{}, in, out)
+func (c *drpcFileClient) FilesDelete(ctx context.Context, in *FilesDeleteRequest) (*FilesDeleteResponse, error) {
+	out := new(FilesDeleteResponse)
+	err := c.cc.Invoke(ctx, "/filesync.File/FilesDelete", drpcEncoding_File_commonfile_fileproto_protos_file_proto{}, in, out)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *drpcFileClient) FilesInfo(ctx context.Context, in *FilesInfoRequest) (*FilesInfoResponse, error) {
+	out := new(FilesInfoResponse)
+	err := c.cc.Invoke(ctx, "/filesync.File/FilesInfo", drpcEncoding_File_commonfile_fileproto_protos_file_proto{}, in, out)
 	if err != nil {
 		return nil, err
 	}
@@ -112,13 +123,24 @@ func (c *drpcFileClient) Check(ctx context.Context, in *CheckRequest) (*CheckRes
 	return out, nil
 }
 
+func (c *drpcFileClient) SpaceInfo(ctx context.Context, in *SpaceInfoRequest) (*SpaceInfoResponse, error) {
+	out := new(SpaceInfoResponse)
+	err := c.cc.Invoke(ctx, "/filesync.File/SpaceInfo", drpcEncoding_File_commonfile_fileproto_protos_file_proto{}, in, out)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 type DRPCFileServer interface {
 	BlockGet(context.Context, *BlockGetRequest) (*BlockGetResponse, error)
 	BlockPush(context.Context, *BlockPushRequest) (*BlockPushResponse, error)
 	BlocksCheck(context.Context, *BlocksCheckRequest) (*BlocksCheckResponse, error)
 	BlocksBind(context.Context, *BlocksBindRequest) (*BlocksBindResponse, error)
-	BlocksDelete(context.Context, *BlocksDeleteRequest) (*BlocksDeleteResponse, error)
+	FilesDelete(context.Context, *FilesDeleteRequest) (*FilesDeleteResponse, error)
+	FilesInfo(context.Context, *FilesInfoRequest) (*FilesInfoResponse, error)
 	Check(context.Context, *CheckRequest) (*CheckResponse, error)
+	SpaceInfo(context.Context, *SpaceInfoRequest) (*SpaceInfoResponse, error)
 }
 
 type DRPCFileUnimplementedServer struct{}
@@ -139,7 +161,11 @@ func (s *DRPCFileUnimplementedServer) BlocksBind(context.Context, *BlocksBindReq
 	return nil, drpcerr.WithCode(errors.New("Unimplemented"), drpcerr.Unimplemented)
 }
 
-func (s *DRPCFileUnimplementedServer) BlocksDelete(context.Context, *BlocksDeleteRequest) (*BlocksDeleteResponse, error) {
+func (s *DRPCFileUnimplementedServer) FilesDelete(context.Context, *FilesDeleteRequest) (*FilesDeleteResponse, error) {
+	return nil, drpcerr.WithCode(errors.New("Unimplemented"), drpcerr.Unimplemented)
+}
+
+func (s *DRPCFileUnimplementedServer) FilesInfo(context.Context, *FilesInfoRequest) (*FilesInfoResponse, error) {
 	return nil, drpcerr.WithCode(errors.New("Unimplemented"), drpcerr.Unimplemented)
 }
 
@@ -147,9 +173,13 @@ func (s *DRPCFileUnimplementedServer) Check(context.Context, *CheckRequest) (*Ch
 	return nil, drpcerr.WithCode(errors.New("Unimplemented"), drpcerr.Unimplemented)
 }
 
+func (s *DRPCFileUnimplementedServer) SpaceInfo(context.Context, *SpaceInfoRequest) (*SpaceInfoResponse, error) {
+	return nil, drpcerr.WithCode(errors.New("Unimplemented"), drpcerr.Unimplemented)
+}
+
 type DRPCFileDescription struct{}
 
-func (DRPCFileDescription) NumMethods() int { return 6 }
+func (DRPCFileDescription) NumMethods() int { return 8 }
 
 func (DRPCFileDescription) Method(n int) (string, drpc.Encoding, drpc.Receiver, interface{}, bool) {
 	switch n {
@@ -190,15 +220,24 @@ func (DRPCFileDescription) Method(n int) (string, drpc.Encoding, drpc.Receiver,
 					)
 			}, DRPCFileServer.BlocksBind, true
 	case 4:
-		return "/filesync.File/BlocksDelete", drpcEncoding_File_commonfile_fileproto_protos_file_proto{},
+		return "/filesync.File/FilesDelete", drpcEncoding_File_commonfile_fileproto_protos_file_proto{},
 			func(srv interface{}, ctx context.Context, in1, in2 interface{}) (drpc.Message, error) {
 				return srv.(DRPCFileServer).
-					BlocksDelete(
+					FilesDelete(
 						ctx,
-						in1.(*BlocksDeleteRequest),
+						in1.(*FilesDeleteRequest),
 					)
-			}, DRPCFileServer.BlocksDelete, true
+			}, DRPCFileServer.FilesDelete, true
 	case 5:
+		return "/filesync.File/FilesInfo", drpcEncoding_File_commonfile_fileproto_protos_file_proto{},
+			func(srv interface{}, ctx context.Context, in1, in2 interface{}) (drpc.Message, error) {
+				return srv.(DRPCFileServer).
+					FilesInfo(
+						ctx,
+						in1.(*FilesInfoRequest),
+					)
+			}, DRPCFileServer.FilesInfo, true
+	case 6:
 		return "/filesync.File/Check", drpcEncoding_File_commonfile_fileproto_protos_file_proto{},
 			func(srv interface{}, ctx context.Context, in1, in2 interface{}) (drpc.Message, error) {
 				return srv.(DRPCFileServer).
@@ -207,6 +246,15 @@ func (DRPCFileDescription) Method(n int) (string, drpc.Encoding, drpc.Receiver,
 						in1.(*CheckRequest),
 					)
 			}, DRPCFileServer.Check, true
+	case 7:
+		return "/filesync.File/SpaceInfo", drpcEncoding_File_commonfile_fileproto_protos_file_proto{},
+			func(srv interface{}, ctx context.Context, in1, in2 interface{}) (drpc.Message, error) {
+				return srv.(DRPCFileServer).
+					SpaceInfo(
+						ctx,
+						in1.(*SpaceInfoRequest),
+					)
+			}, DRPCFileServer.SpaceInfo, true
 	default:
 		return "", nil, nil, nil, false
 	}
@@ -280,16 +328,32 @@ func (x *drpcFile_BlocksBindStream) SendAndClose(m *BlocksBindResponse) error {
 	return x.CloseSend()
 }
 
-type DRPCFile_BlocksDeleteStream interface {
+type DRPCFile_FilesDeleteStream interface {
 	drpc.Stream
-	SendAndClose(*BlocksDeleteResponse) error
+	SendAndClose(*FilesDeleteResponse) error
 }
 
-type drpcFile_BlocksDeleteStream struct {
+type drpcFile_FilesDeleteStream struct {
 	drpc.Stream
 }
 
-func (x *drpcFile_BlocksDeleteStream) SendAndClose(m *BlocksDeleteResponse) error {
+func (x *drpcFile_FilesDeleteStream) SendAndClose(m *FilesDeleteResponse) error {
+	if err := x.MsgSend(m, drpcEncoding_File_commonfile_fileproto_protos_file_proto{}); err != nil {
+		return err
+	}
+	return x.CloseSend()
+}
+
+type DRPCFile_FilesInfoStream interface {
+	drpc.Stream
+	SendAndClose(*FilesInfoResponse) error
+}
+
+type drpcFile_FilesInfoStream struct {
+	drpc.Stream
+}
+
+func (x *drpcFile_FilesInfoStream) SendAndClose(m *FilesInfoResponse) error {
 	if err := x.MsgSend(m, drpcEncoding_File_commonfile_fileproto_protos_file_proto{}); err != nil {
 		return err
 	}
@@ -311,3 +375,19 @@ func (x *drpcFile_CheckStream) SendAndClose(m *CheckResponse) error {
 	}
 	return x.CloseSend()
 }
+
+type DRPCFile_SpaceInfoStream interface {
+	drpc.Stream
+	SendAndClose(*SpaceInfoResponse) error
+}
+
+type drpcFile_SpaceInfoStream struct {
+	drpc.Stream
+}
+
+func (x *drpcFile_SpaceInfoStream) SendAndClose(m *SpaceInfoResponse) error {
+	if err := x.MsgSend(m, drpcEncoding_File_commonfile_fileproto_protos_file_proto{}); err != nil {
+		return err
+	}
+	return x.CloseSend()
+}
diff --git a/commonfile/fileproto/fileprotoerr/fileprotoerr.go b/commonfile/fileproto/fileprotoerr/fileprotoerr.go
index fc7dbb4e..81bdd34d 100644
--- a/commonfile/fileproto/fileprotoerr/fileprotoerr.go
+++ b/commonfile/fileproto/fileprotoerr/fileprotoerr.go
@@ -10,4 +10,5 @@ var (
 	errGroup       = rpcerr.ErrGroup(fileproto.ErrCodes_ErrorOffset)
 	ErrUnexpected  = errGroup.Register(fmt.Errorf("unexpected fileproto error"), uint64(fileproto.ErrCodes_Unexpected))
 	ErrCIDNotFound = errGroup.Register(fmt.Errorf("CID not found"), uint64(fileproto.ErrCodes_CIDNotFound))
+	ErrForbidden   = errGroup.Register(fmt.Errorf("forbidden"), uint64(fileproto.ErrCodes_Forbidden))
 )
diff --git a/commonfile/fileproto/protos/file.proto b/commonfile/fileproto/protos/file.proto
index e7610b83..3118bb76 100644
--- a/commonfile/fileproto/protos/file.proto
+++ b/commonfile/fileproto/protos/file.proto
@@ -6,6 +6,7 @@ option go_package = "commonfile/fileproto";
 enum ErrCodes {
     Unexpected = 0;
     CIDNotFound = 1;
+    Forbidden = 2;
     ErrorOffset = 200;
 }
 
@@ -18,10 +19,14 @@ service File {
     rpc BlocksCheck(BlocksCheckRequest) returns (BlocksCheckResponse);
     // BlocksBind binds CIDs to space
     rpc BlocksBind(BlocksBindRequest) returns (BlocksBindResponse);
-    // BlocksDelete deletes block from space
-    rpc BlocksDelete(BlocksDeleteRequest) returns (BlocksDeleteResponse);
+    // FilesDelete deletes files by id
+    rpc FilesDelete(FilesDeleteRequest) returns (FilesDeleteResponse);
+    // FilesInfo return info by given files id
+    rpc FilesInfo(FilesInfoRequest) returns (FilesInfoResponse);
     // Check checks the connection and credentials
     rpc Check(CheckRequest) returns (CheckResponse);
+    // SpaceInfo returns usage, limit, etc about space
+    rpc SpaceInfo(SpaceInfoRequest) returns (SpaceInfoResponse);
 }
 
 message BlockGetRequest {
@@ -36,8 +41,9 @@ message BlockGetResponse {
 
 message BlockPushRequest {
     string spaceId = 1;
-    bytes cid = 2;
-    bytes data = 3;
+    string fileId = 2;
+    bytes cid = 3;
+    bytes data = 4;
 }
 
 message BlockPushResponse {}
@@ -72,14 +78,50 @@ enum AvailabilityStatus {
 
 message BlocksBindRequest {
     string spaceId = 1;
-    repeated bytes cids = 2;
+    string fileId = 2;
+    repeated bytes cids = 3;
 }
 
 message BlocksBindResponse {}
 
+
+message FilesDeleteRequest {
+    string spaceId = 1;
+    repeated string fileIds = 2;
+}
+
+message FilesDeleteResponse {}
+
+message FilesInfoRequest {
+    string spaceId = 1;
+    repeated string fileIds = 2;
+}
+
+message FilesInfoResponse {
+    repeated FileInfo filesInfo = 1;
+}
+
+message FileInfo {
+    string fileId = 1;
+    uint64 usageBytes = 2;
+    uint32 cidsCount = 3;
+}
+
 message CheckRequest {}
 
 message CheckResponse {
     repeated string spaceIds = 1;
     bool allowWrite = 2;
 }
+
+message SpaceInfoRequest {
+    string spaceId = 1;
+}
+
+message SpaceInfoResponse {
+    uint64 limitBytes = 1;
+    uint64 usageBytes = 2;
+    uint64 cidsCount = 3;
+    uint64 filesCount = 4;
+}
+