Michel...
You were asking me how to prepare your drive for POP OS installation, not about auto mounting.
Auto mounting features is for other drives in the system, to allow them to be mounted on startup. For example, a games library on an external hard drive. You'd want that auto mounted on startup.
Bourne
I find it interesting that MX Linux is using an older kernel 4.19? And it appears according to you, its working perfectly fine without installation of GPU drivers.
I also find it interesting that the OS is using a total of 926MB of RAM out of your 16GB available, thats insanely good on RAM usage. Thats the kind of thing that makes having 32GB of RAM not even matter, if your able to to have 15GB of RAM free for use.