New answers tagged sd-card
I tried this some 2 weeks ago on my retina 15" Mac. The usb I used was Kingston HyperX 128 gb, 3.0 . It ran WinToGo which is basically windows 8. I wanted to play Battlefield 3 but the result were very poor, I actually never managed to play multiplayer because servers kicked me for being AFK :D If you want to try some less demanding games it might work, but ...
As for speed USB 3.0 runs circles around SDXC cards. See Ed Tittel's great article on comparison: http://www.edtittel.com/blog/a-tale-of-tablet-storage-usb-3-vs-micro-sdxc.html
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