So after selling a ton of surfaces at (staples) I decided to snag on on sale with open box discount as well as my employee discount, bringing my 128GB i5 down to 680 bucks. Anyway I love this thing. I have andy (over squareblue) for my android apps however I have been reading a lot about Yosemite and want to dual boot it. The catch? I do not want to partition my HD and loose the already limited space. I want to instead purchase a 64 or 128GB Micro SD and dedicate that to the MAC OS. Has anyone done this before? What are some tips and what loader are you using?