Yesterday I bought Borderlands 4 pack on Steam, so that I, my two brothers and a friend could play together. It was a 66 % discount and therefore was the price only 30 € for the 4 pack.
We played today for about 4-5 hours and got to level 14 (yeey!), but then crashed the game for one of my brothers. And apparently does the game only saves when you exit the game through the menu, which meant that he lost all his progression and had to start from scratch.
But I found an awesome save game editor that you are able to create a save game with, and choose class, name, money, level, skill points and stuff like that. So now is he back on level 14, and almost no harm done.