@tazinblack
Could you explain what you did exactly? You said first try didn't work, and after that you copied the files to the exact same location again like @alteriks said and rebooted?!
I downloaded the image you mentioned
http://os.archlinuxarm.org/os/ArchLinuxARM-rpi-4-latest.tar.gzinstalled properly, boot was no problem.
After boot i copied the files to /usr/lib/firmware/updates/brcm/
i get this from dmesg
$this->bbcode_second_pass_code('', 'dmesg |grep brcm
mmc1:0001:1: Direct firmware load for brcm/brcmfmac43436-sdio.raspberrypi,model-zero-2.txt failed with error -2')
what is strange. Im far from an expert but there is no mention of model-zero-2.txt anywhere. Not in the files nor the directories.
I did this like 10 times now. Copied the files to /usr/lib/firmware/brcm directly, still same error.