I am considering an mba 11 or 13 sometime in the new year. I am coming from a 15 mbp2010. One thing that would be a rather huge adjustment for me would be the decrease in space for stuff. I am not sure how good the 256 is for the price. I like the option of having some things on external media. Specifically, I would like to be able to boot a linux or windows system from a usb3 flash drive. My only experience with this kind of thing is usb2 and 30mb/s I get from external hard drives or much less from flash drives is certainly not enough for this. So here I ask two things: 1. Does there exist an external flash drive that is very fast such that an external operating system could run from it without too much trouble? 2. If such a flash drive existed, could it boot something like Windows?