Okay so I kept d/ling apps off different websites for my mac till it finally said that it was too full to continue. Then my wife bought me this Maxtor OneTouch and I tried to load it. How do I increase the space on my Mac using this and if it is supposed to be an external hard drive, how do I use it. Please type slowly and clearly, I am not quite as computer savy as I thought I was. Thanks. PS it is a Maxtor OneTouch iii Mini Edition with 120GB and my mac is imac 20-inch flat screen.