Hi all, I'm looking to free up disk space on my Macbook. I have tons of photos that I really don't use everyday. What is a good set up to relocate all my photos to an external drive? Is it pretty much just find the file folder and drag it onto the new drive, while it's mounted on my Macbook? Would I need to install Snow Leopard or iPhoto onto the external drive? Am I overthinking this? Thanks in advance for your help.