Im looking to buy an external portable hard drive. I'm a wedding photographer who edits on a 13" rMBP and obviously the internal HD doesn't hold enough when you're working on 2-3 weddings at a time. Biggest thing that drives me nuts with a spinning HD is the time it takes to spin up, and then when it goes to sleep after a few minutes. I don't like the lag. I'm wondering if an external SSD would be my answer. I could probably make due with something in the 256GB-500GB range, so the benefit of a 1TB+ spinning HD isn't something I really need.