How much do you have and how much do you think is enough for you? I have 1700 Gigs worth of space and i find i need it all. I use a 200GB HD as my main HD for evryday use + OS. I use a 2nd internal 500GB HD where i have all my tv shows, music and ripped dvd's. I have a 1000 Gig external that i use as a backup which i use every 3 days to transfer everything there. If i keep downloading tv shows/podcasts at the pace i am doing i will need another internal HD but not anytime soon. One of my friends use a 20GB HD and he is happy while the other uses 4000 Gigs worth of space. Gods only knows what he uses it for.