Hmm I wonder Austin. I only use 30gb right now, of my 75gb harddrive, and I'm managing just fine. I think that 20TB (wth) is an extremely luxery that we won't really need, and with need I mean for standard use. If you are going to put all movies you own on there as well as games, then I understand why you could use 20TB. For an average person, 1 tb would be hard to fill up these days.
And please don't tell me to go buy a bigger harddrive, lol. You can give me one if you're nice, but I just don't have the money for anything right now. Not spending a single cent next to my cell phone (which is about $2 a month).