I’ve configured USB stick following this tutorial since my router doesn’t have an option for DHCP reservation.
It works but just for simplicity, I’m curious if it’s possible to achieve the same outcome using just SD card with Hass.io install in my Pi 3? I guess not but I’d rather ask.
Did you create the CONFIG folder (in uppercase) at the root of the Disk partition? and put files in it?
From the HassOS code, this folder should be mounted in /mnt/config/CONFIG at boot