Originally Posted by Ratbert
Have you tried doing a forensic focus (select focus then the * to get the menu) and looking for corrupt media, if you find any you could exclude them from the backup and try again?
I found one album flagged as corrupt media using Forensics Focus in Core Control. I deleted the album from my MD600. Backup still fails with "Unknown Error".

Soundserge

Antipodes CX + Roon, 818v3, DSP 7200SEs, 218, DSP3200s