When I collect 100-200GB of watched anime (preferable series that have no upcoming sequels), I record it to tape and delete it from my hard drives to make space for something new. Still, now that I am seeding a lot of stuff on BBT, it's hard to stop some torrent that gets good upload, which means that not only I am more likely to just keep the files, also I mostly have to keep them on my DL server, which only has a 320GB HDD (when I had slow connection, I would download files to it, then move them to some other HDD after seeding them enough; seeding from a network drive is a bit unreliable and uses more resources).