Drivers without internet during Installation

[kebchi]

Hello guys,

I am using a Dell 13 9343 and I wanted to install Debian 10 (dual boot).
I finished the installtion however I have several problems with some non-free drivers and mainly with the wifi one ( Broadcom)

I looked at this link which shows how to install the neeeded drivers for the wifi but it semmes very difficult without Internet.

I don't have RG45 plug but I can use Ethernet with a Thunderblot adapter but it doesn't work...
I tried to use HDMI ( with an adapter ) on the Thunderbolt port and it works, but not the Ethernet ( wit hadapter too) ...

I have also issues with audio but I think the main point is to get itnernet first then I coudl downlaod some packages for drivers.

Could someone help me please ?
Thanks !

[Head_on_a_Stick]

I can use Ethernet with a Thunderblot adapter but it doesn't work...

We can't help you unless you tell use exactly what you tried and provide some actual error messages or logs.