Hi there! Thanks for the welcome! I have had a flick through the files on the HD5 and i appear to have mp3 files and ATRAC3plus and ATRAC files on there. I uninstalled SonicStage 3.3 and reinstalled 3.1 which came with the device but it is now saying - The commected ATRAC Audio Device must be initialized to be used with the currently installed SonicStage- This time i do not have th error message number appearing though. Any thoughts?