This worked for me, until today: Your MP3 files, converted to MP3 with Itunes, can be transferred as a simple FILE/COPY from their location on your computer (in the Explorer directory) to your Nokia phone using the cable that came with the phone. You don't need Nokia software to do this, you need only the cable. My problem is this: Today I tried my usual copy of 800mb worth of MP3 files, and the message "Not enough free space" came up. So I turned everything off and tried it again, but this time the computer doesn't see the Nokia 5310, but the other device I use on that port (Sandisk Flash Drive) works just fine. I tried plugging in the cable with the phone off, then turning the phone on, but no difference. So anyway, give it a try. It worked for me until today. Anybody reading this with a suggestion for my problem, please respond.