Start a new game and choose arc 3
i did but it wont work
No idea how it won't work. Either you're running an old version of the game or at the boot up, you're not loading the third arc.
wait which one should i click the 279 kib thingy or the other ones 216 and 215 kib what even is that
I'm not even sure what you're talking about, mate. what are those numbers?