I have had this mp3 player for a few years and i just now got around to putting new music on here. the problem is the music i initially added on here will not come off. it does not show up on windows media player that the music is on there and so i can not remove it. however, i can get new music on there with the remaining room the old music is not taking up but i can not remove the old music. it takes up quite a bit of space and i can't jam out properly!