Hi,
I also had a Minidisc of the same generation but the 50X model. I got rid of it when I found that I coudn't transfer the digital audio from the minidisc to the PC, for "copyright reasons" (as Rowuk explained). At that time, Sony didn't care if your recording is something you own (copyright point of view) or not.
Have you checked on
Minidisc Community Forums (Powered by Invision Power Board) to see if there is a way to do it properly with your model ? I know that Sony changed his mind on the copyright issues on recent models but I don't know if the change can be applied to your model.
Stéphane