I have a external drive that has lots of production related files in it. I try to setup a automatic backup system by going into dropbox-click on my profile-click prefences- backup-manage backup- then i try to add my external drive but after selecting it it says "There was an issue backup up 'LIGHTING' Your files are safe in your external drive. Go to help center to learn more". I dont understand why this error is happening and how to fix it. Lmk what i can do and phrase it simple so i can understand.