Compulsive Hoarding is a real psychological condition, and like everything else, it’s gone digital. From Wired:

“Jim” is an infohoarder like few others. In the last four years, this 37-year-old Brooklyn native has downloaded and burned every piece of broadcast and print media that’s been digitized. Or so it seems. His apartment is filled with DVDs and CDs packed with bootleg anime, comic books, books, e-books, television programs, movies and, of course, music. He’s a completionist who must have every episode, every issue, every track.

Even if you’re not an obsessive compulsive hoarder, it’s worth paying attention to how much data is accumulating on your drives. Remember, Delete is your friend.