LibreSDR not booting from SD-card

[RasmusEk]

Hi, I realize that you aren't responsible for the LibreSDR but I kinda need help

I tried to copy your pre-built firmware on a freshly formated SD card fileformat FAT32

my LibreSDR does not seem to boot with them and keeps acting as a plutoSDR. I draw this conclusion from not beeing able to detect it's ethernet port by pinging it, sniffing it or just seeing it in winbox. It still acts as a Pluto working fine from a USB port however I kinda need the ethernet capability.

I think I might be missing the step "Once it is running, the software can be updated using mounted drive" could you explain this to me in greater detail as I struggle to figure what I am supposed to do