diff --git a/cmd/subcmd/bput.go b/cmd/subcmd/bput.go
index acc6a84..d6a1acf 100644
--- a/cmd/subcmd/bput.go
+++ b/cmd/subcmd/bput.go
@@ -180,8 +180,11 @@ func processBputCommand(command *cobra.Command, args []string) error {
 	logger.Debugf("use staging dir - %s", irodsTempDirPath)
 
 	// clean up staging dir in the target dir
-	unusedStagingDir := commons.GetDefaultStagingDirInTargetPath(targetPath)
-	defer filesystem.RemoveDir(unusedStagingDir, true, true)
+	defer func() {
+		unusedStagingDir := commons.GetDefaultStagingDirInTargetPath(targetPath)
+		logger.Debugf("delete staging dir - %s", unusedStagingDir)
+		filesystem.RemoveDir(unusedStagingDir, true, true)
+	}()
 
 	bundleTransferManager := commons.NewBundleTransferManager(filesystem, targetPath, maxFileNum, maxFileSize, localTempDirPath, irodsTempDirPath, diff, noHash, progress)
 	bundleTransferManager.Start()
diff --git a/commons/bundletransfer.go b/commons/bundletransfer.go
index ef4c5d8..8992713 100644
--- a/commons/bundletransfer.go
+++ b/commons/bundletransfer.go
@@ -446,8 +446,8 @@ func (manager *BundleTransferManager) Start() {
 	//        --> remove ------------>
 
 	go func() {
-		logger.Debug("start transfer thread 1")
-		defer logger.Debug("exit transfer thread 1")
+		logger.Debug("start input thread")
+		defer logger.Debug("exit input thread")
 
 		defer close(processBundleTarChan)
 		defer close(processBundleRemoveFilesChan)
@@ -477,8 +477,8 @@ func (manager *BundleTransferManager) Start() {
 
 	// process bundle - tar
 	go func() {
-		logger.Debug("start transfer thread 2")
-		defer logger.Debug("exit transfer thread 2")
+		logger.Debug("start bundle thread")
+		defer logger.Debug("exit bundle thread")
 
 		defer close(processBundleUploadChan)
 
@@ -513,8 +513,8 @@ func (manager *BundleTransferManager) Start() {
 
 	// process bundle - upload
 	funcAsyncUpload := func(id int, wg *sync.WaitGroup) {
-		logger.Debugf("start transfer thread 3-%d", id)
-		defer logger.Debugf("exit transfer thread 3-%d", id)
+		logger.Debugf("start transfer thread %d", id)
+		defer logger.Debugf("exit transfer thread %d", id)
 
 		defer wg.Done()
 
@@ -565,8 +565,8 @@ func (manager *BundleTransferManager) Start() {
 
 	// process bundle - remove files
 	go func() {
-		logger.Debug("start transfer thread 4")
-		defer logger.Debug("exit transfer thread 4")
+		logger.Debug("start stale file remove thread")
+		defer logger.Debug("exit stale file remove thread")
 
 		defer close(processBundleExtractChan2)
 
@@ -600,15 +600,15 @@ func (manager *BundleTransferManager) Start() {
 	}()
 
 	// process bundle - extract
-	go func() {
-		logger.Debug("start transfer thread 5")
-		defer logger.Debug("exit transfer thread 5")
+	// order may be different
+	removeTaskCompleted := map[int64]int{}
+	removeTaskCompletedMutex := sync.Mutex{}
 
-		defer manager.endProgress()
+	funcAsyncExtract := func(id int, wg *sync.WaitGroup) {
+		logger.Debugf("start extract thread %d", id)
+		defer logger.Debugf("exit extract thread %d", id)
 
-		// order may be different
-		removeTaskCompleted := map[int64]int{}
-		removeTaskCompletedMutex := sync.Mutex{}
+		defer wg.Done()
 
 		for {
 			select {
@@ -649,7 +649,7 @@ func (manager *BundleTransferManager) Start() {
 							}
 						}
 
-						defer manager.transferWait.Done()
+						manager.transferWait.Done()
 					} else {
 						removeTaskCompleted[bundle1.index] = 1
 						removeTaskCompletedMutex.Unlock()
@@ -697,7 +697,7 @@ func (manager *BundleTransferManager) Start() {
 							}
 						}
 
-						defer manager.transferWait.Done()
+						manager.transferWait.Done()
 					} else {
 						removeTaskCompleted[bundle2.index] = 1
 						removeTaskCompletedMutex.Unlock()
@@ -713,6 +713,18 @@ func (manager *BundleTransferManager) Start() {
 				return
 			}
 		}
+	}
+
+	waitAsyncExtract := sync.WaitGroup{}
+	for i := 0; i < 3; i++ {
+		waitAsyncExtract.Add(1)
+		go funcAsyncExtract(i, &waitAsyncExtract)
+	}
+
+	go func() {
+		waitAsyncExtract.Wait()
+
+		manager.endProgress()
 	}()
 }