I have an M8S box with S812 on it. I can boot to the Android System Restore screen, but when I choose "Install from EXT" and then try to boot from SDCard or USB Flash Drive, it only shows "System Volume Information" as a selection on the following screen.
I'm using Etcher (as suggested) and tried using the following image:
LibreELEC-S8X2.arm-8.2.2-M8.img
Should I be using another image?
Thanks.