Thanks, guys. Nice to know I'm not alone.
I just expect a product to work, unreasonable as that may be. Especially a premium-priced product like the AK120.
Oh, of course the 120 doesn't erase the songs, but if it doesn't recognize the card(s,) what's the diff?
And I learn, albeit slowly. So next time the device hiccups, I'll shut-down-and-restart as a first step rather than a last.