Unfortunately I’m forced to send back my brand new Samsung YP-U2. I love the little bugger to bits! It does exactly what I want out of a portable music player. The problem is that it doesn’t always show up as a USB device.
I’ve tested it on three different computers, running two different OSs, in 7 different USB ports (all which work perfectly with other USB devices). It works sometimes but not always, a rough estimate would be 1 out of 10 times. I think it’s pretty safe to say it’s the player that doesn’t behave. That isn’t good enough, so it’s going back to Amazon to be replaced.