BIG Memory

What would a person need with a 1TB Hard drive?
To be honest I need one. My laptop came with 230 or so GB. It is already half full or half empty depending on how you look at it. I have had this laptop for about 5 or 6 months. It is full of DVD quality movies, music, photos, and of course school work. I figured that I would purchase a external hard drive like the one pictured above to store the data that I don't use that much.