How do you 'safely' disconnect a USB from either machine? I can't locate any disconnection details in the manual.
Correct, this cannot effect the data on the USB drive, the safe disconnect on computers is there only to stop you whipping it out if it is still writing data to the stick.As the other guys have said, just wait for it to stop playing and unplug it, if you're that worried just turn the unit off and whip it out.