Booted up a fresh Better MC server, and along with several exceptions saying corrupted chunks, the backup didn't save to the location I specified. Running server on Windows 10.

Seems to be working fine in my testing, Can you provide your log files as we print a message if we reset the backup location due to an error?

I am in the midst of doing a bunch of server/os changes so if I run into it again on my new os, I will submit another bug with logs. You can close this.