Hmm, I have a broken Super Mario Bros/Duck Hunt/WCTM cart for the NES lying around... I may just turn it into an external HDD.

Also, @KomicZ: Link, please? I don't believe I've even seen a 4TB drive, and the cheapest I can find bare 2TB drives is usually around $90.

(I just looked at the linked site. Dear lord, $170 for a 1TB drive?)