diff --git a/weed/filer2/filer.go b/weed/filer2/filer.go
index 672c6201c..eae1107ca 100644
--- a/weed/filer2/filer.go
+++ b/weed/filer2/filer.go
@@ -70,7 +70,7 @@ func (f *Filer) CreateEntry(entry *Entry) error {
 	var lastDirectoryEntry *Entry
 
 	for i := 1; i < len(dirParts); i++ {
-		dirPath := "/" + filepath.Join(dirParts[:i]...)
+		dirPath := "/" + filepath.ToSlash(filepath.Join(dirParts[:i]...))
 		// fmt.Printf("%d directory: %+v\n", i, dirPath)
 
 		// first check local cache
diff --git a/weed/filesys/dir_rename.go b/weed/filesys/dir_rename.go
index d29281f35..e18f67edc 100644
--- a/weed/filesys/dir_rename.go
+++ b/weed/filesys/dir_rename.go
@@ -41,7 +41,7 @@ func (dir *Dir) Rename(ctx context.Context, req *fuse.RenameRequest, newDirector
 
 func moveEntry(ctx context.Context, client filer_pb.SeaweedFilerClient, oldParent string, entry *filer_pb.Entry, newParent, newName string) error {
 	if entry.IsDirectory {
-		currentDirPath := filepath.Join(oldParent, entry.Name)
+		currentDirPath := filepath.ToSlash(filepath.Join(oldParent, entry.Name))
 
 		lastFileName := ""
 		includeLastFile := false
@@ -65,7 +65,7 @@ func moveEntry(ctx context.Context, client filer_pb.SeaweedFilerClient, oldParen
 
 			for _, item := range resp.Entries {
 				lastFileName = item.Name
-				err := moveEntry(ctx, client, currentDirPath, item, filepath.Join(newParent, newName), item.Name)
+				err := moveEntry(ctx, client, currentDirPath, item, filepath.ToSlash(filepath.Join(newParent, newName)), item.Name)
 				if err != nil {
 					return err
 				}
diff --git a/weed/replication/replicator.go b/weed/replication/replicator.go
index ac8235fd5..48a81a093 100644
--- a/weed/replication/replicator.go
+++ b/weed/replication/replicator.go
@@ -34,7 +34,7 @@ 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
 	}
-	newKey := filepath.Join(r.sink.GetSinkToDirectory(), key[len(r.source.Dir):])
+	newKey := filepath.ToSlash(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 {
diff --git a/weed/server/filer_grpc_server.go b/weed/server/filer_grpc_server.go
index 4f1377331..d593a425e 100644
--- a/weed/server/filer_grpc_server.go
+++ b/weed/server/filer_grpc_server.go
@@ -19,7 +19,7 @@ import (
 
 func (fs *FilerServer) LookupDirectoryEntry(ctx context.Context, req *filer_pb.LookupDirectoryEntryRequest) (*filer_pb.LookupDirectoryEntryResponse, error) {
 
-	entry, err := fs.filer.FindEntry(filer2.FullPath(filepath.Join(req.Directory, req.Name)))
+	entry, err := fs.filer.FindEntry(filer2.FullPath(filepath.ToSlash(filepath.Join(req.Directory, req.Name))))
 	if err != nil {
 		return nil, fmt.Errorf("%s not found under %s: %v", req.Name, req.Directory, err)
 	}
@@ -112,7 +112,7 @@ func (fs *FilerServer) LookupVolume(ctx context.Context, req *filer_pb.LookupVol
 
 func (fs *FilerServer) CreateEntry(ctx context.Context, req *filer_pb.CreateEntryRequest) (resp *filer_pb.CreateEntryResponse, err error) {
 
-	fullpath := filer2.FullPath(filepath.Join(req.Directory, req.Entry.Name))
+	fullpath := filer2.FullPath(filepath.ToSlash(filepath.Join(req.Directory, req.Entry.Name)))
 	chunks, garbages := filer2.CompactFileChunks(req.Entry.Chunks)
 
 	fs.filer.DeleteChunks(garbages)
@@ -135,7 +135,7 @@ func (fs *FilerServer) CreateEntry(ctx context.Context, req *filer_pb.CreateEntr
 
 func (fs *FilerServer) UpdateEntry(ctx context.Context, req *filer_pb.UpdateEntryRequest) (*filer_pb.UpdateEntryResponse, error) {
 
-	fullpath := filepath.Join(req.Directory, req.Entry.Name)
+	fullpath := filepath.ToSlash(filepath.Join(req.Directory, req.Entry.Name))
 	entry, err := fs.filer.FindEntry(filer2.FullPath(fullpath))
 	if err != nil {
 		return &filer_pb.UpdateEntryResponse{}, fmt.Errorf("not found %s: %v", fullpath, err)
@@ -147,7 +147,7 @@ func (fs *FilerServer) UpdateEntry(ctx context.Context, req *filer_pb.UpdateEntr
 	chunks, garbages := filer2.CompactFileChunks(req.Entry.Chunks)
 
 	newEntry := &filer2.Entry{
-		FullPath: filer2.FullPath(filepath.Join(req.Directory, req.Entry.Name)),
+		FullPath: filer2.FullPath(filepath.ToSlash(filepath.Join(req.Directory, req.Entry.Name))),
 		Attr:     entry.Attr,
 		Chunks:   chunks,
 	}
@@ -186,7 +186,7 @@ func (fs *FilerServer) UpdateEntry(ctx context.Context, req *filer_pb.UpdateEntr
 }
 
 func (fs *FilerServer) DeleteEntry(ctx context.Context, req *filer_pb.DeleteEntryRequest) (resp *filer_pb.DeleteEntryResponse, err error) {
-	err = fs.filer.DeleteEntryMetaAndData(filer2.FullPath(filepath.Join(req.Directory, req.Name)), req.IsRecursive, req.IsDeleteData)
+	err = fs.filer.DeleteEntryMetaAndData(filer2.FullPath(filepath.ToSlash(filepath.Join(req.Directory, req.Name))), req.IsRecursive, req.IsDeleteData)
 	return &filer_pb.DeleteEntryResponse{}, err
 }
 
diff --git a/weed/server/filer_ui/breadcrumb.go b/weed/server/filer_ui/breadcrumb.go
index d056a4b25..55a1909a8 100644
--- a/weed/server/filer_ui/breadcrumb.go
+++ b/weed/server/filer_ui/breadcrumb.go
@@ -16,7 +16,7 @@ func ToBreadcrumb(fullpath string) (crumbs []Breadcrumb) {
 	for i := 0; i < len(parts); i++ {
 		crumbs = append(crumbs, Breadcrumb{
 			Name: parts[i] + "/",
-			Link: "/" + filepath.Join(parts[0:i+1]...),
+			Link: "/" + filepath.ToSlash(filepath.Join(parts[0:i+1]...)),
 		})
 	}