Sorry to bump this old topic but I believe I corrupted my Mini M8S 2's eMMC when I tried to install LibreELEC on it. Box froze during the flash. Can no longer flash ROM's using USB Burning Tool as flashes hang at 7%, the formatting stage.
If I manage to boot LibreELEC from a USB, would it be possible to format the eMMC?
why don't you try it