yes I know that. But this is for one person, not a whole market. Anyone that has "worn a notebook on my belt since 1993" will know the difference.
But another windows driver? I wouldn't suggest that, too much risk and potential conflicts.
Best and easiest (forget ext2/3) is a bigger SD card. Cheap, easy, done. And works on Winders and the linux machine that I'll bet he also has.