Martin,

No one seems to have answered your query above. Its a while back so you may have got some advice by now, if not the following may be of use.

The more recent Minidisk players allow you to hook up your player by a USB connection. With this you can transfer the files digitally without loss of quality. If not you can take hook a connection between the head/earphone jack on your MD player and use recording software to transfer it onto the computer. This will be an analogue connection which means (a) it will take as long to record as it does to play (digital transfers will be a lot quicker) and (b) you may lose quality in the recording process.