diff --git a/docs/index.md b/docs/index.md
index 28fa255..f8fd880 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -49,6 +49,7 @@ visit: http://127.0.0.1:8080 login as admin/admin123
 ## Limitations
 - Symlinks are not supported by the underlying [Flysystem](https://flysystem.thephpleague.com/v1/docs/adapter/local/)
 - File ownership is not supported (chown)
+- Too many files in the same directory can negatively impact performance
 
 ## Why Open Source on GitHub?