ok well i have an mp3 and when i plug it into the USB port a file pops up with all of my music on my mp3. To get music on my mp3 i normally just take the music from limewire and drag it into this file but now when i do it that write-protection thing pops up and it wont let me put the music on my mp3. I also went to Puretracks and got some music hoping it would go on my mp3 but that came up with the same problem, it was also a waste of 20 dollars.