I have a 2010 13" MBP. Right now I have a 1TB Seagate SSHD drive installed. I saw today that Amazon has a SanDisk 256GB SSD on sale for $120. My existing drive is only about half full and about 210GB of that is my iTunes library. I can move all of that to an AirDisk and I subscribe to iTunes Match so I don't need all that music on my main disk. I may look at removing the Superdrive and putting the 1TB drive there. If I get this new drive I would probably do a fresh install of Mavericks (from the cloud) but what would happen if I then decided to restore from a Time Machine backup to get all my documents, photos and apps back? Would it fail because the drive is only 1/4 the size of my original drive? I guess I could just copy everything over from the current drive. I have a USB drive housing I could use.