A nice exciting new error in Microlite BackupEdge today.
af token exists before mount
Got this error in edgemenu when we attempted to access a usb disk which was setup as an attached file system af0, using a file system partition fsp0.
Turned out that once again there were left over files in the mount point:
/usr/lib/edge/system/mnt/af0
Moved the .edge_af file to /tmp and it's all working again now!
I wish the firm would make the change to using the smartdrive method, it's certainly less problematic in my experience.