I'm thinking of getting an SSD for my Macbook Pro (unibody, late 2009), but don't feel comfortable only carrying 60/120GB around with me! I've searched around and found that it's possible to install your old SATA drive in a caddy in place of your optical drive - I've struggled long and hard with the idea of completely removing my optical drive but I think if I got an external enclosure for it I could probably make do (would rather be out somewhere and not be able to burn a CD than lose my 500GB of internal storage!) So with all that to think about - does anybody have any preferred methods/arrangements? What size SSD would you go for? If I'm going to keep my 500GB drive in I'd probably go for a 60GB SSD for the OS/apps. Is there an external USB enclosure I can buy that will accept my SuperDrive? Or would I be better off buying a completely new/faster drive? Am I likely to see that great of a performance increase? And what will adding a second hard drive likely do to my battery consumption? Not that I typically use my MBP on battery in a day-to-day scenario..... I have many questions! Apologies if they've already been answered.... Looking forwards to hearing some opinions!!