The M201d image worked! So yes I guess this board must only have 512 MB. Oh well. At least I can see what kind of trouble I can get into with LibreELEC. That was the main goal.
I also have an M8S. Board is labelled "M8 V9_1" with a date code of 20160120. I see that you have an image for the M8+, which doesn't work for me. Is there an image for that board that you would recommend?
I will search around to see what I can find.
Thanks again!