I decided I would try storing some music on a USB flashdrive and play it through the USB port of the sound system in my S80 (2011 if that makes any difference). All I'm getting is a message on the display saying that it is "not readable". I know the flashdrive is formatted correctly. Plus I am able to play this music on my MacBook at home as well as my Windows based computer at work. Incidentally, the music I put on this flashdrive was copied from my "I-tunes" music library on my MacBook. Would that have anything to do with it? Like I said, I can also play it on my Windows based computer at work.