I got a Wii for Christmas & modded to play backups off of 250 GB usb drive, also put a NTFS partition on it & put avi movies on it to play with mplayer_ce in homebrew channel, I have 52 games on it & some of those games have like 10-15 games per disc so I have more the 70 I would think. Cost effective for sure, plus keeps your originals in good condition to boot. I think like 65% of the drive is being used.