Hi, I was wanting to occasionally run windows on my macbook air, however I didn't was to partition the drive to allocate some space for window (I only have 5gbs free space after transferring everything over) So I was wondering if it was possible to install windows on a thumb drive and just plug it in when I wanted to use windows. Is this possible? If so, how would I go about doing it? And how big a thumb drive would I need? Any drawbacks? Thanks you.