I have a 2TB external hard-drive.
But I don't use it too much, or rather haven't recently.
It's got a lot of movies/tv programmes on it, since my brother transferred them all onto it.
And it has several steam games installed on it.
And then besides that, I have a couple of 2GB or similar sized SD cards, but they either come from my camera or my 3DS, having swapped out the default ones for larger ones.
And there's probably a 2GB memory stick or two somewhere.
I don't use too much space on my laptop, to be fair.
I'm at 485GB out of 1TB memory.