It seems using the USB stick to play music from is a bit of an issue in a couple of ways. I normally use bluetooth but also like the fact that I can use the USB and have the ability to see all of the songs from the USB shown on the screen. Otherwise, using bluetooth I would have to pick up my iPhone and change songs, for example. The problems I am currently having are couple of things. First, some of my songs from iTunes are in .m4a format, which doesn't seem to be recognized by the M3. It needs to be converted to .mp3 format. I was able to finally find a software to do this mass conversion as about half of my songs are somehow in .m4a format. Second, most of my songs have album artwork, which I see on my computer in iTunes and on my iPhone. But when I play it in the M3, only a very small percentage actually shows up with artwork. I've tried saving all of the songs in the root folder on the USB and as well in subfolders, but that doesn't seem to correct the issue. Is anyone having these issues or is aware of how to fix so that all of the artwork shows up on the screen?