I see they have 40gb, 80, 120, 160, 250, and 320. The boy wants a PS3 and the prices just dropped so we're talking about it.

We're used to the PS2, where all the data are stored on the optical disks, and you save your games on small (maybe 32mb?) flash cards.

With the PS3, the games still come on optical media, so what is all the storage for? How much do I need? What might make me want a PS3 with more than 40gb or 80gb?