diff --git a/weed/command/filer_replication.go b/weed/command/filer_replication.go
index 419ae3174..9639ac98a 100644
--- a/weed/command/filer_replication.go
+++ b/weed/command/filer_replication.go
@@ -115,6 +115,8 @@ func runFilerReplicate(cmd *Command, args []string) bool {
 		}
 		if err = replicator.Replicate(key, m); err != nil {
 			glog.Errorf("replicate %s: %+v", key, err)
+		} else {
+			glog.V(4).Infof("replicated %s", key)
 		}
 	}
 
diff --git a/weed/command/scaffold.go b/weed/command/scaffold.go
index 4d836d9bc..56fc50516 100644
--- a/weed/command/scaffold.go
+++ b/weed/command/scaffold.go
@@ -209,7 +209,7 @@ aws_access_key_id     = ""     # if empty, loads from the shared credentials fil
 aws_secret_access_key = ""     # if empty, loads from the shared credentials file (~/.aws/credentials).
 region = "us-east-2"
 bucket = "your_bucket_name"    # an existing bucket
-directory = ""                 # destination directory (do not prefix or suffix with "/")
+directory = "/"                # destination directory
 
 [sink.google_cloud_storage]
 # read credentials doc at https://cloud.google.com/docs/authentication/getting-started
@@ -224,15 +224,14 @@ enabled = false
 account_name = ""
 account_key  = ""
 container = "mycontainer"      # an existing container
-directory = ""                 # destination directory (do not prefix or suffix with "/")
+directory = "/"                # destination directory
 
 [sink.backblaze]
-# experimental, let me know if it works
 enabled = false
-account_id = ""
-account_key  = ""
+b2_account_id = ""
+b2_master_application_key  = ""
 bucket = "mybucket"            # an existing bucket
-directory = ""                 # destination directory (do not prefix or suffix with "/")
+directory = "/"                # destination directory
 
 `
 )
diff --git a/weed/replication/replicator.go b/weed/replication/replicator.go
index 208e0894a..ac8235fd5 100644
--- a/weed/replication/replicator.go
+++ b/weed/replication/replicator.go
@@ -34,7 +34,9 @@ func (r *Replicator) Replicate(key string, message *filer_pb.EventNotification)
 		glog.V(4).Infof("skipping %v outside of %v", key, r.source.Dir)
 		return nil
 	}
-	key = filepath.Join(r.sink.GetSinkToDirectory(), key[len(r.source.Dir):])
+	newKey := filepath.Join(r.sink.GetSinkToDirectory(), key[len(r.source.Dir):])
+	glog.V(3).Infof("replicate %s => %s", key, newKey)
+	key = newKey
 	if message.OldEntry != nil && message.NewEntry == nil {
 		glog.V(4).Infof("deleting %v", key)
 		return r.sink.DeleteEntry(key, message.OldEntry.IsDirectory, message.DeleteChunks)
diff --git a/weed/replication/sink/azuresink/azure_sink.go b/weed/replication/sink/azuresink/azure_sink.go
index 6adbfd75b..7acf37fa5 100644
--- a/weed/replication/sink/azuresink/azure_sink.go
+++ b/weed/replication/sink/azuresink/azure_sink.go
@@ -5,6 +5,7 @@ import (
 	"context"
 	"fmt"
 	"net/url"
+	"strings"
 
 	"github.com/Azure/azure-storage-blob-go/azblob"
 	"github.com/chrislusf/seaweedfs/weed/filer2"
@@ -71,6 +72,8 @@ func (g *AzureSink) initialize(accountName, accountKey, container, dir string) e
 
 func (g *AzureSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool) error {
 
+	key = cleanKey(key)
+
 	if isDirectory {
 		key = key + "/"
 	}
@@ -88,6 +91,8 @@ func (g *AzureSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks boo
 
 func (g *AzureSink) CreateEntry(key string, entry *filer_pb.Entry) error {
 
+	key = cleanKey(key)
+
 	if entry.IsDirectory {
 		return nil
 	}
@@ -132,6 +137,14 @@ func (g *AzureSink) CreateEntry(key string, entry *filer_pb.Entry) error {
 }
 
 func (g *AzureSink) UpdateEntry(key string, oldEntry, newEntry *filer_pb.Entry, deleteIncludeChunks bool) (foundExistingEntry bool, err error) {
+	key = cleanKey(key)
 	// TODO improve efficiency
 	return false, nil
 }
+
+func cleanKey(key string) string {
+	if strings.HasPrefix(key, "/") {
+		key = key[1:]
+	}
+	return key
+}
diff --git a/weed/replication/sink/b2sink/b2_sink.go b/weed/replication/sink/b2sink/b2_sink.go
index ce0e9eb3c..17f5e39b2 100644
--- a/weed/replication/sink/b2sink/b2_sink.go
+++ b/weed/replication/sink/b2sink/b2_sink.go
@@ -2,6 +2,8 @@ package B2Sink
 
 import (
 	"context"
+	"strings"
+
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
 	"github.com/chrislusf/seaweedfs/weed/replication/sink"
@@ -31,8 +33,8 @@ func (g *B2Sink) GetSinkToDirectory() string {
 
 func (g *B2Sink) Initialize(configuration util.Configuration) error {
 	return g.initialize(
-		configuration.GetString("account_id"),
-		configuration.GetString("account_key"),
+		configuration.GetString("b2_account_id"),
+		configuration.GetString("b2_master_application_key"),
 		configuration.GetString("bucket"),
 		configuration.GetString("directory"),
 	)
@@ -46,7 +48,7 @@ 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
+		return err
 	}
 
 	g.client = client
@@ -58,6 +60,8 @@ func (g *B2Sink) initialize(accountId, accountKey, bucket, dir string) error {
 
 func (g *B2Sink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool) error {
 
+	key = cleanKey(key)
+
 	if isDirectory {
 		key = key + "/"
 	}
@@ -77,6 +81,8 @@ func (g *B2Sink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool)
 
 func (g *B2Sink) CreateEntry(key string, entry *filer_pb.Entry) error {
 
+	key = cleanKey(key)
+
 	if entry.IsDirectory {
 		return nil
 	}
@@ -123,6 +129,16 @@ func (g *B2Sink) CreateEntry(key string, entry *filer_pb.Entry) error {
 }
 
 func (g *B2Sink) UpdateEntry(key string, oldEntry, newEntry *filer_pb.Entry, deleteIncludeChunks bool) (foundExistingEntry bool, err error) {
+
+	key = cleanKey(key)
+
 	// TODO improve efficiency
 	return false, nil
 }
+
+func cleanKey(key string) string {
+	if strings.HasPrefix(key, "/") {
+		key = key[1:]
+	}
+	return key
+}
diff --git a/weed/replication/sink/s3sink/s3_sink.go b/weed/replication/sink/s3sink/s3_sink.go
index 3d497d795..0a4e78318 100644
--- a/weed/replication/sink/s3sink/s3_sink.go
+++ b/weed/replication/sink/s3sink/s3_sink.go
@@ -2,6 +2,7 @@ package S3Sink
 
 import (
 	"fmt"
+	"strings"
 	"sync"
 
 	"github.com/aws/aws-sdk-go/aws"
@@ -77,6 +78,8 @@ func (s3sink *S3Sink) initialize(awsAccessKeyId, aswSecretAccessKey, region, buc
 
 func (s3sink *S3Sink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool) error {
 
+	key = cleanKey(key)
+
 	if isDirectory {
 		key = key + "/"
 	}
@@ -87,6 +90,8 @@ func (s3sink *S3Sink) DeleteEntry(key string, isDirectory, deleteIncludeChunks b
 
 func (s3sink *S3Sink) CreateEntry(key string, entry *filer_pb.Entry) error {
 
+	key = cleanKey(key)
+
 	if entry.IsDirectory {
 		return nil
 	}
@@ -125,6 +130,14 @@ func (s3sink *S3Sink) CreateEntry(key string, entry *filer_pb.Entry) error {
 }
 
 func (s3sink *S3Sink) UpdateEntry(key string, oldEntry, newEntry *filer_pb.Entry, deleteIncludeChunks bool) (foundExistingEntry bool, err error) {
+	key = cleanKey(key)
 	// TODO improve efficiency
 	return false, nil
 }
+
+func cleanKey(key string) string {
+	if strings.HasPrefix(key, "/") {
+		key = key[1:]
+	}
+	return key
+}