I was thinking about dumping all of my Cube ISOs onto the 500GB drive (there's only 86MB being used by the Dreamcast Complete set).
Then, I could use my mini DVD-RW to play a game, burn a new one on it, and so on, trashing all those other discs just taking up space.
Providing, of course, the Cube will read the mini DVD-RW. I've never tried.