thanks. all good points. having a backup is a good idea. But I think doing weekly backups from the player to my hard drive is adequate, rather than keeping everything in sync all the time.
As far as choosing modes goes, I think that being able to tag the files directly on the player is a plus… and I see no drawback to the MSC mode, at least not yet. So I switched to it and I’ll stck with that for now. I did reformat the player and re-copy everything over after I switched modes, and it worked just fine.
thanks for all your help.