Okay- I have never installed a hard drive myself in a MacBook and the instructions I found online mentioned nothing about the metal caddy with the pulltab. I have a pre-unibody white MacBook. Today was my first time- I switched from a HD to an SSD. Once I removed the original HD with the pull tab, I guess I was so excited to get the job done, that I simply slipped in the SSD without thinking and never placed it in the metal caddy with the pull tab. Since I didn't have the screwdriver needed to do it and it seemed like a tight fit - I decided to test it by placing it in the slot. I simply pushed the SSD in until it connected to test the fit. Unfortunately there was still some room, so it appears that it was supposed to go in the metal caddy after all! The problem is- I have no way to get it out! Will it hurt if I simply leave the SSD as it is without it being in the caddy? Will it cause any problems being in there loose? What is the purpose of the caddy- simply for a better fit and the tab? Right now, everything seems to be working fine. This was definitely an idiotic thing to do, I know but any insight would be great. Thank you!