diff --git a/README.md b/README.md
index 41305a223..fb3058dbf 100644
--- a/README.md
+++ b/README.md
@@ -81,7 +81,7 @@ SeaweedFS can work very well with just the object store. [[Filer]] is added late
 * [filer server][Filer] provide "normal" directories and files via http.
 * [mount filer][Mount] to read and write files directly as a local directory via FUSE.
 * [Amazon S3 compatible API][AmazonS3API] to access files with S3 tooling.
-* [Async Backup To Cloud][BackupToCloud] can enjoy extreme fast local access and backup to Amazon S3, Google Cloud Storage, Azure.
+* [Async Backup To Cloud][BackupToCloud] can enjoy extreme fast local access and backup to Amazon S3, Google Cloud Storage, Azure, BackBlaze.
 
 [Filer]: https://github.com/chrislusf/seaweedfs/wiki/Directories-and-Files
 [Mount]: https://github.com/chrislusf/seaweedfs/wiki/Mount
diff --git a/weed/command/filer_replication.go b/weed/command/filer_replication.go
index 8d5c9d8cc..1c137bb53 100644
--- a/weed/command/filer_replication.go
+++ b/weed/command/filer_replication.go
@@ -6,6 +6,8 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/replication"
 	"github.com/chrislusf/seaweedfs/weed/replication/sink"
+	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/azuresink"
+	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/b2sink"
 	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/filersink"
 	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/gcssink"
 	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/s3sink"
diff --git a/weed/command/scaffold.go b/weed/command/scaffold.go
index 2e7aa0cb6..95ddbd57c 100644
--- a/weed/command/scaffold.go
+++ b/weed/command/scaffold.go
@@ -195,12 +195,20 @@ bucket = "your_bucket_seaweedfs"    # an existing bucket
 directory = "/"                     # destination directory
 
 [sink.azure]
-# experimental
+# experimental, let me know if it works
 enabled = false
 account_name = ""
 account_key  = ""
 container = "mycontainer"      # an existing container
 directory = ""                 # destination directory (do not prefix or suffix with "/")
 
+[sink.backblaze]
+# experimental, let me know if it works
+enabled = false
+account_id = ""
+account_key  = ""
+bucket = "mybucket"            # an existing bucket
+directory = ""                 # destination directory (do not prefix or suffix with "/")
+
 `
 )
diff --git a/weed/replication/sink/b2sink/b2_sink.go b/weed/replication/sink/b2sink/b2_sink.go
new file mode 100644
index 000000000..ce0e9eb3c
--- /dev/null
+++ b/weed/replication/sink/b2sink/b2_sink.go
@@ -0,0 +1,128 @@
+package B2Sink
+
+import (
+	"context"
+	"github.com/chrislusf/seaweedfs/weed/filer2"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"github.com/chrislusf/seaweedfs/weed/replication/sink"
+	"github.com/chrislusf/seaweedfs/weed/replication/source"
+	"github.com/chrislusf/seaweedfs/weed/util"
+	"github.com/kurin/blazer/b2"
+)
+
+type B2Sink struct {
+	client      *b2.Client
+	bucket      string
+	dir         string
+	filerSource *source.FilerSource
+}
+
+func init() {
+	sink.Sinks = append(sink.Sinks, &B2Sink{})
+}
+
+func (g *B2Sink) GetName() string {
+	return "backblaze"
+}
+
+func (g *B2Sink) GetSinkToDirectory() string {
+	return g.dir
+}
+
+func (g *B2Sink) Initialize(configuration util.Configuration) error {
+	return g.initialize(
+		configuration.GetString("account_id"),
+		configuration.GetString("account_key"),
+		configuration.GetString("bucket"),
+		configuration.GetString("directory"),
+	)
+}
+
+func (g *B2Sink) SetSourceFiler(s *source.FilerSource) {
+	g.filerSource = s
+}
+
+func (g *B2Sink) initialize(accountId, accountKey, bucket, dir string) error {
+	ctx := context.Background()
+	client, err := b2.NewClient(ctx, accountId, accountKey)
+	if err != nil {
+		return nil
+	}
+
+	g.client = client
+	g.bucket = bucket
+	g.dir = dir
+
+	return nil
+}
+
+func (g *B2Sink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool) error {
+
+	if isDirectory {
+		key = key + "/"
+	}
+
+	ctx := context.Background()
+
+	bucket, err := g.client.Bucket(ctx, g.bucket)
+	if err != nil {
+		return err
+	}
+
+	targetObject := bucket.Object(key)
+
+	return targetObject.Delete(ctx)
+
+}
+
+func (g *B2Sink) CreateEntry(key string, entry *filer_pb.Entry) error {
+
+	if entry.IsDirectory {
+		return nil
+	}
+
+	totalSize := filer2.TotalSize(entry.Chunks)
+	chunkViews := filer2.ViewFromChunks(entry.Chunks, 0, int(totalSize))
+
+	ctx := context.Background()
+
+	bucket, err := g.client.Bucket(ctx, g.bucket)
+	if err != nil {
+		return err
+	}
+
+	targetObject := bucket.Object(key)
+	writer := targetObject.NewWriter(ctx)
+
+	for _, chunk := range chunkViews {
+
+		fileUrl, err := g.filerSource.LookupFileId(chunk.FileId)
+		if err != nil {
+			return err
+		}
+
+		var writeErr error
+		_, readErr := util.ReadUrlAsStream(fileUrl, chunk.Offset, int(chunk.Size), func(data []byte) {
+			_, err := writer.Write(data)
+			if err != nil {
+				writeErr = err
+			}
+		})
+
+		if readErr != nil {
+			return readErr
+		}
+		if writeErr != nil {
+			return writeErr
+		}
+
+	}
+
+	return writer.Close()
+
+}
+
+func (g *B2Sink) UpdateEntry(key string, oldEntry, newEntry *filer_pb.Entry, deleteIncludeChunks bool) (foundExistingEntry bool, err error) {
+	// TODO improve efficiency
+	return false, nil
+}