diff --git a/app/chain/transfer.py b/app/chain/transfer.py
index bd2a0311..acd1c987 100644
--- a/app/chain/transfer.py
+++ b/app/chain/transfer.py
@@ -92,7 +92,7 @@ class TransferChain(ChainBase):
     def do_transfer(self, path: Path, meta: MetaBase = None,
                     mediainfo: MediaInfo = None, download_hash: str = None,
                     target: Path = None, transfer_type: str = None,
-                    epformat: EpisodeFormat = None, min_filesize: int = None) -> Tuple[bool, str]:
+                    epformat: EpisodeFormat = None, min_filesize: int = 0) -> Tuple[bool, str]:
         """
         执行一个复杂目录的转移操作
         :param path: 待转移目录或文件
diff --git a/app/utils/system.py b/app/utils/system.py
index 758b0b47..5f419414 100644
--- a/app/utils/system.py
+++ b/app/utils/system.py
@@ -95,6 +95,10 @@ class SystemUtils:
         """
         获取目录下所有指定扩展名的文件（包括子目录）
         """
+
+        if not min_filesize:
+            min_filesize = 0
+
         if not directory.exists():
             return []