Hello @Ludo-code, Proton interacting with NTFS is known to be finicky, and the general recommendation is to use a linux native filesystem with Proton.
There are several issue reports already tracking this issue and opening another one isn't particularly beneficial.
That said, you may be lucky with one of the workarounds at https://github.com/ValveSoftware/Proton/wiki/Using-a-NTFS-disk-with-Linux-and-Windows.
Nothing extracted yet.
Proton: 1655841837 experimental-7.0-20220621
I have tried to launch a game on my secondary drive (windows installed) and game doesn't launch and log print this :
======================
Proton: 1655841837 experimental-7.0-20220621
SteamGameId: 24840
Command: ['/media/ludovic/F80AE5800AE53C6E/SteamLibrary/steamapps/common/Medal of Honor Airborne/UnrealEngine3/Binaries/MOHA.exe']
Options: {'forcelgadd'}
depot: 0.20220509.53
pressure-vessel: 0.20220420.0
scripts: v0.20220311.0-0-gae4cbed
soldier: 0.20220509.0 soldier 0.20220509.0
Kernel: Linux 5.15.0-40-generic #43-Ubuntu SMP Wed Jun 15 12:54:21 UTC 2022 x86_64
Have you an idea to fix it ?