diff --git a/sage/data_manager.py b/sage/data_manager.py
index 8e48e1c..38231cd 100644
--- a/sage/data_manager.py
+++ b/sage/data_manager.py
@@ -159,7 +159,7 @@ def _should_include(self, file_path: str) -> bool:
         _, extension = os.path.splitext(file_path)
         extension = extension.lower()
         file_name = os.path.basename(file_path)
-        dirs = os.path.dirname(file_path).split("/")
+        dirs = os.path.dirname(file_path).split(os.sep)
 
         if self.inclusions:
             return (