diff --git a/bk7231tools/analysis/kvstorage.py b/bk7231tools/analysis/kvstorage.py
index 1460713..5f68708 100644
--- a/bk7231tools/analysis/kvstorage.py
+++ b/bk7231tools/analysis/kvstorage.py
@@ -220,7 +220,7 @@ def find_storage(data: bytes) -> Optional[Tuple[int, bytes]]:
             pos -= 32  # rewind to block start
         except ValueError:
             return None
-        return pos, data[pos:]
+        return pos, data[pos:pos+0x8000]
 
     @staticmethod
     def find_user_param_key(data: bytes) -> Optional[Tuple[int, str]]: