I am a photography. Right now, most of my photos are stored on my internal 750GB HDD in my Macbook Pro. I then use Time Machine every hour, and once every so often, I do another Time Machine backup with another external hard drive, and that hard drive is stored in a water proof, fire proof, bomb proof indestructible case. However I'm changing my file system. I just bought a LaCie external hard drive, which I am going to store all of my photos and Lightroom library on so that I can use it with multiple computers. Is there a way to use Time Machine for my external hard drive? This way I can have a backup of my external hard drive with all of my pictures. Thanks!