saving was working fine before patch 1.6 and the "cross progression"
how to disable it and use the "old" saving method ?

les sauvegardes fonctionnaient parfaitement avant le patch 1.6 et le nouveau "cross progression" (inutile)
comment désactiver cela et sauvegarder "normalement" en local ??? (si je désactive internet impossible de sauvegarder)

The saving method is still the same. When you save you save locally, and by default when you quit the game your saves are also uploaded to the cloud.
By what I read on the changelog,cross progression is a feature added to cloud saving. So to disable it, just disable cloud saving.

To do that go to the game page on your library on Galaxy (cloud saving only works on Galaxy) and click on the top right button right next to 'play'. Go to 'configure' > 'features' and untick the cloud saving option.

Just bear in mind that if you disable cloud saving you won't have an online backup of your saves, and will have to do it manually.

Nope, before 1.6 saving was instantly made in local, now it takes several minutes to save (even in quick save F5)...
what you say is exactly the same as turning my internet down (what i tried before my first message)
i was looking for a specific command in the launcher /or an "hidden" option in the game menu /or something to do in the folder itself...
but thank you for the reply :)

No worries :)