Then inspect the Windows registry and look for the LocalAppData key. Verify that it’s still there and pointing to the right drive letter and folder. [HowTo] An extended guide on how to move the Plex data folder on Windows
If everything is OK with the registry, verify that the drive F: is still healthy and accessible.
It must not be filled to the brim.
Look for your server’s log files on F:
There ought to be a Logs folder. See if one of the Plex Media Server.log files contains the word “malformed”. If that’s the case, the database file is damaged.
