I've been putting this off for a few years now, but I finally picked up a 1 Terabyte HDD for my PS3 (the same model I have in my PS4, actually). It arrived yesterday, and I'm currently in the process of installing every game I currently own and downloading every digital game and DLC I've ever purchased. My goal is to eliminate the biggest annoyance that comes with trying to clear out my PS3 backlog: dealing with installing game data and downloading DLC. I have no faith the PS3 PSN will be kept up longer than maybe another year or two, so I'm just working on making my PS3 as prepared for that eventuality as possible. Oddly enough, it's the goddamn trophy syncing that's proving to be the biggest hassle, as PSN just will not let me sync my thousands of trophies onto my new HDD without crashing the connection.
On a sidenote, anyone want to take a guess at how much space I'll have left once all this installing/downloading is complete and how long it will take? Just FYI, I have 1670 items in my PS3 download history (which won't all be downloaded since a lot of that are demos, trailers, or PS+ games, but most of it would be). :P: