Yeah Wish you could change where it saves all the data easily inside of the application its self with out changing the shortcut. It ate 3gb of 5gb free on my C:\ Drive before i found this post with a search, after the game crashed when jumping up and filling in dirt behind me and thought it might have something to do with the limited HDD space i have on the OS hdd.
had to get the short names cause it wasn't working in steam. used dir /x