Maintenance for the week of March 16:
• PC/Mac: No maintenance – March 16
• ESO Store and Account System for maintenance – March 18, 6:00AM EDT (10:00 UTC) - 4:00PM EDT (20:00 UTC)
On your pc only, nothing is saved on the server except your control keys.
If your settings are reverted something is blocking access to your documents folder. Search here for Antivirus e.g. Or OneDrive. To find threads which describe how to whitelist/allow it.