I actually just picked up a Seagate USB3 4TB drive, and I'm really liking it. It's fast, quiet, and obviously very spacious, without being very big. I got it, of course, because I wanted a robust external storage solution that could handle all of my pictures and videos, as I tend to travel with my camera and appreciate being able to clear memory cards and perform editing on the go.
Now, I'm still going to be in the market for an internal solution that my external solution backs up to (or from?), but I'll save that for another day