Here's the deal. I download an mp3 onto my windows computer. I copy said mp3 to a USB storedrive and then copy said mp3 to said powerbook. When attempting to add said mp3 to said iTunes list in perscribed itunes help manner, get message: "attempting to copy to the disk "computer name" failed. You do not have enough access priviliges for this operation." What the F*** is going on. If the administrator of the computer doesn't have enough access privliges to copy a file from one part of a computer to another, who the hell does? I have copied m4a's from my windoes machine before. Why not this?