Hmmm. I've noticed that on things that don't work, the PC Link program pauses when copying over files. I just tried to upload 2 MP3's, and one hung up halfway through transferring. Incidentally, it resets the MP3 player halfway through the song... The other MP3 lagged near the end of the transfer, and it resets near the end of the song. Also, the game I downloaded lags while copying over one of the bigger data files. I wonder if I can figure out another way to upload files...