diff --git a/pkg/brpb/brpb.pb.go b/pkg/brpb/brpb.pb.go
index c2da17f09..9498953f8 100644
--- a/pkg/brpb/brpb.pb.go
+++ b/pkg/brpb/brpb.pb.go
@@ -409,10 +409,12 @@ type BackupMeta struct {
 	DbMaps []*PitrDBMap `protobuf:"bytes,22,rep,name=db_maps,json=dbMaps,proto3" json:"db_maps,omitempty"`
 	Mode   BackupMode   `protobuf:"varint,23,opt,name=mode,proto3,enum=backup.BackupMode" json:"mode,omitempty"`
 	// record the backup range and the correspond SST files when using file-copy backup.
-	Ranges               []*BackupRange `protobuf:"bytes,24,rep,name=ranges,proto3" json:"ranges,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}       `json:"-"`
-	XXX_unrecognized     []byte         `json:"-"`
-	XXX_sizecache        int32          `json:"-"`
+	Ranges []*BackupRange `protobuf:"bytes,24,rep,name=ranges,proto3" json:"ranges,omitempty"`
+	// record the size of the backup data files and meta files
+	BackupSize           uint64   `protobuf:"varint,25,opt,name=backup_size,json=backupSize,proto3" json:"backup_size,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *BackupMeta) Reset()         { *m = BackupMeta{} }
@@ -609,6 +611,13 @@ func (m *BackupMeta) GetRanges() []*BackupRange {
 	return nil
 }
 
+func (m *BackupMeta) GetBackupSize() uint64 {
+	if m != nil {
+		return m.BackupSize
+	}
+	return 0
+}
+
 type BackupRange struct {
 	StartKey             []byte   `protobuf:"bytes,1,opt,name=start_key,json=startKey,proto3" json:"start_key,omitempty"`
 	EndKey               []byte   `protobuf:"bytes,2,opt,name=end_key,json=endKey,proto3" json:"end_key,omitempty"`
@@ -4679,6 +4688,13 @@ func (m *BackupMeta) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 		i -= len(m.XXX_unrecognized)
 		copy(dAtA[i:], m.XXX_unrecognized)
 	}
+	if m.BackupSize != 0 {
+		i = encodeVarintBrpb(dAtA, i, uint64(m.BackupSize))
+		i--
+		dAtA[i] = 0x1
+		i--
+		dAtA[i] = 0xc8
+	}
 	if len(m.Ranges) > 0 {
 		for iNdEx := len(m.Ranges) - 1; iNdEx >= 0; iNdEx-- {
 			{
@@ -7681,6 +7697,9 @@ func (m *BackupMeta) Size() (n int) {
 			n += 2 + l + sovBrpb(uint64(l))
 		}
 	}
+	if m.BackupSize != 0 {
+		n += 2 + sovBrpb(uint64(m.BackupSize))
+	}
 	if m.XXX_unrecognized != nil {
 		n += len(m.XXX_unrecognized)
 	}
@@ -9924,6 +9943,25 @@ func (m *BackupMeta) Unmarshal(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
+		case 25:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field BackupSize", wireType)
+			}
+			m.BackupSize = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowBrpb
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.BackupSize |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
 		default:
 			iNdEx = preIndex
 			skippy, err := skipBrpb(dAtA[iNdEx:])
diff --git a/proto/brpb.proto b/proto/brpb.proto
index f9df3b143..e30079dea 100644
--- a/proto/brpb.proto
+++ b/proto/brpb.proto
@@ -129,6 +129,9 @@ message BackupMeta {
 
     // record the backup range and the correspond SST files when using file-copy backup.
     repeated BackupRange ranges = 24;
+
+    // record the size of the backup data files and meta files
+    uint64 backup_size = 25;
 }
 
 message BackupRange {
diff --git a/scripts/proto.lock b/scripts/proto.lock
index 92e7405e7..376e50afd 100644
--- a/scripts/proto.lock
+++ b/scripts/proto.lock
@@ -416,6 +416,11 @@
                 "name": "ranges",
                 "type": "BackupRange",
                 "is_repeated": true
+              },
+              {
+                "id": 25,
+                "name": "backup_size",
+                "type": "uint64"
               }
             ],
             "reserved_ids": [