diff --git a/backend/config_parser.py b/backend/config_parser.py
index 1e39752..29cfaaf 100644
--- a/backend/config_parser.py
+++ b/backend/config_parser.py
@@ -301,6 +301,8 @@ class TranscodeTools:
                         async for chunk in nvr.stream_file(file, preview_pre_bytes):
                             await raw.write(chunk)
             except asyncio.TimeoutError as te:
+                idx = self.preview_storage.index(preview_file)
+                del self.preview_storage[idx]
                 self.logger.info(f"Cancel download file: {te}")
                 os.remove(raw_file)
             finally: