Hey people. I was wondering what the main point is in having an external hard drive. Do you guys keep it as a backup in case you lose your original memory or what? I have a 100GB HD in my Mac Mini with about 75 GB left and was wondering if I should get an external HD. I might want to upgrade my 5 megapixel camera to about a 8-9 megapixel, and an external HD would be a great way to store all my digital pics, right? Is there such a thing as an exteral hard drive less than 100 GB? Thanks. Also, it hooks up via USB port and all you do is drap and drop? I know, I'm only 17 years old and I also just got my Mac 3-4 months ago. I'm learning.