I am running a SEAGATE barracuda 1TB, I bought it when I assembled my pc and was on a budget(the HDD was cheap and had good reviews on the net). The reason I got the 1TB is because I need enough storage for my porn . I also have an external 500MB WD "my passport" for backup and other data such as movies. My next upgrade would probably be a 120GB samsung 840 pro ssd for my boot drive and for using some programs and games.