diff --git a/docker/replication.toml b/docker/replication.toml
index 75e34a899..833bb1692 100644
--- a/docker/replication.toml
+++ b/docker/replication.toml
@@ -6,6 +6,6 @@ grpcAddress = "filer:18888"
 # i.e., all files with this "prefix" are sent to notification message queue.
 directory = "/buckets"
 
-[sink.backup]
+[sink.local_incremental]
 enabled = true
 directory = "/data"
\ No newline at end of file
diff --git a/weed/command/filer_replication.go b/weed/command/filer_replication.go
index f2754139b..47ef5d1b6 100644
--- a/weed/command/filer_replication.go
+++ b/weed/command/filer_replication.go
@@ -9,9 +9,9 @@ import (
 	"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/backupsink"
 	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/filersink"
 	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/gcssink"
+	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/localincrementalsink"
 	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/localsink"
 	_ "github.com/chrislusf/seaweedfs/weed/replication/sink/s3sink"
 	"github.com/chrislusf/seaweedfs/weed/replication/sub"
diff --git a/weed/replication/replicator.go b/weed/replication/replicator.go
index 81d546c3c..7688029e6 100644
--- a/weed/replication/replicator.go
+++ b/weed/replication/replicator.go
@@ -42,14 +42,14 @@ func (r *Replicator) Replicate(ctx context.Context, key string, message *filer_p
 		return nil
 	}
 	var dateKey string
-	if r.sink.GetName() == "backup" {
-		var crTime int64
+	if r.sink.GetName() == "local_incremental" {
+		var mTime int64
 		if message.NewEntry != nil {
-			crTime = message.NewEntry.Attributes.Crtime
+			mTime = message.NewEntry.Attributes.Mtime
 		} else if message.OldEntry != nil {
-			crTime = message.OldEntry.Attributes.Crtime
+			mTime = message.OldEntry.Attributes.Mtime
 		}
-		dateKey = time.Unix(crTime, 0).Format("2006-01-02")
+		dateKey = time.Unix(mTime, 0).Format("2006-01-02")
 	}
 	newKey := util.Join(r.sink.GetSinkToDirectory(), dateKey, key[len(r.source.Dir):])
 	glog.V(3).Infof("replicate %s => %s", key, newKey)
diff --git a/weed/replication/sink/backupsink/backup_sink.go b/weed/replication/sink/backupsink/backup_sink.go
deleted file mode 100644
index df0a778d1..000000000
--- a/weed/replication/sink/backupsink/backup_sink.go
+++ /dev/null
@@ -1,18 +0,0 @@
-package backupsink
-
-import (
-	"github.com/chrislusf/seaweedfs/weed/replication/sink"
-	"github.com/chrislusf/seaweedfs/weed/replication/sink/localsink"
-)
-
-type BackupSink struct {
-	localsink.LocalSink
-}
-
-func (backupsink *BackupSink) GetName() string {
-	return "backup"
-}
-
-func init() {
-	sink.Sinks = append(sink.Sinks, &BackupSink{})
-}
diff --git a/weed/replication/sink/localincrementalsink/local_incremental_sink.go b/weed/replication/sink/localincrementalsink/local_incremental_sink.go
new file mode 100644
index 000000000..97da3a5f7
--- /dev/null
+++ b/weed/replication/sink/localincrementalsink/local_incremental_sink.go
@@ -0,0 +1,18 @@
+package localincrementalsink
+
+import (
+	"github.com/chrislusf/seaweedfs/weed/replication/sink"
+	"github.com/chrislusf/seaweedfs/weed/replication/sink/localsink"
+)
+
+type LocalIncSink struct {
+	localsink.LocalSink
+}
+
+func (localincsink *LocalIncSink) GetName() string {
+	return "local_incremental"
+}
+
+func init() {
+	sink.Sinks = append(sink.Sinks, &LocalIncSink{})
+}