Update README.md

README.md

@@ -31,6 +31,7 @@ Files are uploaded using a cache-safe trick to avoid LFS errors.
 1. Set secrets in Space Settings:
    - `BACKUP_REPO`
    - `HF_TOKEN`
-  Please note: Leaving any of these secret empty will not start the Auto Backup Service.
+- Please note: Leaving any of these secret empty will not start the Auto Backup Service and will NOT restore the last version.
+- All files will be wiped clean on Space restart. It is recommended for you to have Persistent storage space, or a private data store repo on HF. 
 2. Launch Space → Access VS Code on port 7860.
 3. Work normally, backups run in the background.