Well, let's see.....on THIS computer.....the one I use the most.
A 250gig as C:
A 400gig as D:
A 300gig as E:
A 300gig as F:
So, 1.25TB.
That's not counting the ~4TB of networked external storage and the storage space in the 6 other PC's in the house. We currently have about 8TB of total storage space here. Never really added it up completely.
The PC in my bedroom (which I rarely use) is the lightest on internal storage......only 360gigs......one 160gig as C: and a 200gig as D:, my old 60gig died in it, but I never took it out, just unplugged it.
Actually, I guess the laptop technically has the least amount of internal storage....only a 180gig.
We record a lot of TV shows and that is what is using most of the space.