Absolutely brilliant.
I could not find that myself!
From reading it it looks like it dies not actually flash the control board when using the SD card method but 'runs' from it when inserted.
It will return to original FW when SD card is removed.
Is this correct?
I'm going to order a small micro SD card now as all mine are 32/64Gb.
Thanks for the advice.
If you put the card in it will run the gear with brains.
If you pull the card out it will go back to bitmain firmware.
A 16gb or 8 gb card should work
Some 32gb cards work but a lot don’t