So today my friend come to copy Spiral Knight game and i use back up and restore function in steam like my other Steam games. After waiting a while it say back up failed and i try to show the game to my friend. Then the program start getting weird it ask to update the game again for 300 MB or so after waiting downloading we try to back up again. But we copied the program Spiral Knight under "steam\steamapps\common\spiral knight" (700MB) just in case [stuff] happens we can restore it again. And we got failed message again and copy the 700 MB file to "steam\steamapps\common\spiral knight" and try run it again. The program want to update again and when i check the file size it immediately it shows 350 MB WTH just happen here =.="

so TL:DR is Spiral Knight not supporting back up and restore in steam? I hope dev can fix it so we have easier way to copy it