So, the $10 a month for subscribing to usenet I get, though I personally just use public torrent trackers. What's with the ~30TB server and how is that related?

So, the $10 a month for subscribing to usenet I get, though I personally just use public torrent trackers. What's with the ~30TB server and how is that related? Do you want to be able to come back to anything you've ever downloaded anytime?