Well sure, except 1) I don't need to because iOS doesn't waste as much space; and 2) That's a whole separate partition with a separate set of data to manage/lose, and a new USB drive to have sticking out of your Surface all the time, unplugging and putting away when you pack it up and pulling it out and plugging it in when you're looking to do work.

Personally, I wouldn't want a 'tablet' with a USB drive sticking out two inches all the time.