diff --git a/karbor/services/protection/bank_plugins/file_system_bank_plugin.py b/karbor/services/protection/bank_plugins/file_system_bank_plugin.py
index 91939555..10f35198 100644
--- a/karbor/services/protection/bank_plugins/file_system_bank_plugin.py
+++ b/karbor/services/protection/bank_plugins/file_system_bank_plugin.py
@@ -186,4 +186,6 @@ class FileSystemBankPlugin(BankPlugin):
             LOG.error("List objects failed. err: %s", err)
             raise exception.BankListObjectsFailed(reason=err)
         else:
+            if prefix is not None:
+                file_lists = [(prefix + file_name) for file_name in file_lists]
             return file_lists[-limit:] if limit is not None else file_lists
diff --git a/karbor/tests/unit/protection/test_file_system_bank_plugin.py b/karbor/tests/unit/protection/test_file_system_bank_plugin.py
index 5f5e4752..a7089062 100644
--- a/karbor/tests/unit/protection/test_file_system_bank_plugin.py
+++ b/karbor/tests/unit/protection/test_file_system_bank_plugin.py
@@ -54,10 +54,10 @@ class FileSystemBankPluginTest(base.TestCase):
     def test_list_objects(self):
         self.fs_bank_plugin.update_object("/list/key-1", "value-1")
         self.fs_bank_plugin.update_object("/list/key-2", "value-2")
-        objects = self.fs_bank_plugin.list_objects(prefix="/list")
+        objects = self.fs_bank_plugin.list_objects(prefix="/list/")
         self.assertEqual(2, len(objects))
-        self.assertIn('key-1', objects)
-        self.assertIn('key-2', objects)
+        self.assertIn('/list/key-1', objects)
+        self.assertIn('/list/key-2', objects)
 
     def test_update_object(self):
         self.fs_bank_plugin.update_object("/key-1", "value-1")