Hi, are you uploading all the songs straight onto the mp3 player all in one directory?, i would recommend trying to create some folders, and put about 100-200 songs in each, if you still get the same error, reduce the number of songs you put in each folder. The reason i am sayign this is because i had a problem with my mp3 player once were it said it was full and i couldent copy anything else on, so i did abit of googling, and found that its because you need to create multiple folders for some reason, strange solution, but it solved it