Your just going to have to ask if you can transfer all of your music to your sons computer so you can upload it from there.
Hope someone can help. I purchased a Sony Walkman mp3 (NWZ-E345)My computer doesn't recognize when it's plugged into the USB port. Previously I used a Sandisk with no problems. Now, it doesn't recogize the sandisk model either. Yet, I can plug in my camera and download my pictures and my children can plug in their iphones and mp3 players and the computer recognizes the portable device. I can plug my mp3 players into my son's computer and it recognizes it as a portable device. How can I get my computer to recognize my 2 mp3 players? I'm running Windows XP.