If you have a folder protected from updates and deletes then it will display a light blue shield icon.
If you want to enable/disable this feature for a folder here are the steps to follow:
- Hover the folder with the status that you want to change
- Hover the menu icon of that folder
- Click Change protection
- Check/uncheck the Protected box in order to protect/unprotect it.
- Click Ok
If the folder is protected then it will display a light blue shield icon. If the light blue shield icon is missing then the folder is not marked for this kind of protection.