You nailed it, @ludovic.
Version here is: Version: 20190114-2, which is the version of buster(stable) according to your firmware-iwlwifi link.
From your link and from @fieryrajang 's feedback here below, my package version should be: 20200918-1~bpo10+1: all.
I changed, in debian-10:
- in the file /etc/apt/sources.list.d/backports.list:
deb http://ftp.debian.org/debian buster-backports main
into
deb https://deb.debian.org/debian buster-backports main contrib non-free sudo apt install firmware-iwlwifi
into
sudo apt -t buster-backports install firmware-iwlwifi
and… It worked!
sys-net with debian-10 connects to my wifi!
Thank you so much to both of you, @ludovic and @fieryrajang, for all your help!!
PS:
@deeplow, I tried to change the title of this thread but did not manage to. I think @fieryrajang’s suggestion would be great.
Thanks!