Actually I think if you grind the tabs off in the back cover, remove all the blue rubber padding and use the factory battery, or factory sized battery, you just might be able to get a 8mm drive to fit. It'll be *extremely* close, but there is a small chance it'll work. No way it'll work with a higher capacity battery pack though. Right now I'm running a higher capacity battery pack, with all the rubber padding and the factory 20gig drive and everything *barely* fits in the 320.