diff --git a/aiogram/contrib/fsm_storage/files.py b/aiogram/contrib/fsm_storage/files.py
index 88960375..f67a6f69 100644
--- a/aiogram/contrib/fsm_storage/files.py
+++ b/aiogram/contrib/fsm_storage/files.py
@@ -15,7 +15,7 @@ class _FileStorage(MemoryStorage):
         path = self.path = pathlib.Path(path)
 
         try:
-            self._data = self.read(path)
+            self.data = self.read(path)
         except FileNotFoundError:
             pass