I am thinking of having the superdrive replaced with a SSD on my late 2009 i7 iMac. The machine has a 2TB hard drive that is about 40% full, primarily with photos (I use Lightroom, Photoshop and plugins) and lossless as well as mp3 music. I also have a 2TB external drive that I use for my Time Machine backup. I have always had everything on a single hard drive and partition. If I get a 256Gb or 512 GB SSD, what would be the easiest way for me to get the OS and applications onto it, separate my data and set up an ongoing backup system?