Torrent users looking at you here!
I hooked up an external hard drive to download Final Cut Pro 2 Studio once it was 50gb but I copped out of it and then just went for 4gb of the apps only.
The largest one i ever downloaded was a 30gb Every Episode of the Sopranos Torrent.
Runner up is 23gb of brazzers.com porn which is currently underway.
Like that's 50gb right there it's pretty crazy how fast HDD is used up!