I have a 2012 IMac and currently have Bootcamp on it but its really slow when I want to boot into the Bootcamp to play games. I was thinking of getting a 128GB SSD with Thunderbolt and installing Windows on to that and then booting into Windows from there. Then I thought why not put OSX on it too but if I want to use the Windows Bootcamp on my Macbook Air I couldn't as would have to shut down my IMac all the time. So the question is could I use an External 128GB SSD for OSX and another one for Windows 8? Also if I installed Windows 8 on the External SSD could I use it on my Macbook Air 2013? Also I was thinking of buying these Thunderbolt but could I get away with USB3? Thanks in Advance