Kobolo

This is really starting to bother me... I have heard of the zombie server and the thing that its an 'official server',and many cant play it,and recieve the 'This game session no longer exists', including myself.Why bother putting thoose servers in junkies csgo then? If there is a solution on how to fix that session problem,and play some of the servers like the zombies,then please someone post it here and highlight it,cause i really dont understand why am i recieving that message on the majority of servers when i try to play.... Many thanks.

Uhm...wheres the acf file? xd

Ive been wondering if theres a stats folder,or save folder idk how to call it.My brother wants to play too so i dont want him to interfeere in my progress.