Yep, 20GB harddrive.
I just plugged in my memory stick full of music, press 'Media' and theres an option yo transfer music. Very easy.
Works brill with iPhone music aswell over bluetooth all with album covers on the centre display.
Another thing is you can also play videos too!
@crobson1969 what type of video files were you playing? what format were they? That's great news! I've been looking for confirmation that videos can play and so far no one has known anything!