So I bought a caddy to put an ssd in the optical bay slot (Mid 2010 13" MBP). I did this, no problem, but when I booted up it took a lot longer than usual. Not only this, when it supposedly booted up, everything looked like it should- my login apps started (caffeine and smcFanControl), my external HDD showed up on the desktop and my bluetooth magic mouse showed up as 'connected'. HOWEVER, when I moved the trackpad, everything seemed normal as it usually would, until I decide to click on something, at which point everything is completely unresponsive (I don't mean laggy or frozen, nor did the beach ball appear), absolutely NOTHING happens. After multiple attempts at this, I removed the caddy and the ssd which was inside it, replacing it with its original superdrive. Everything worked normally again. I checked and the SSD I used in the caddy was working fine, it appears the only thing that isn't is the caddy. What do you think it causing this problem? Is it the caddy, or am I not doing it correctly? I bought a fairly cheap caddy which I probably shouldn't, here it is if it makes any difference- http://www.amazon.co.uk/Drive-Caddy...S6/ref=sr_1_11?ie=UTF8&qid=1342370335&sr=8-11 I'm using Samsung 830's. If it's the caddy I'm sending it back and purchasing the trusty OWC Data Doubler which I should have done in the first place.