Hi,
Please pay attention before update the FFU/Update eMMC Fw, always do backup by Read eMMC Fw at first.
Updating the eMMC firmware may cause damage to your chip, so understand the risks and uses carefully before deciding to update any firmware.
NikoCellular Here some ffu backup from others ufixers, hope it match with your chip.
KMGD6001BM-B421_rev0x01
KMRC10014M-B809_rev0x07
KMRH60014A-B614_rev0x00
credit to Mr. Tomat_Pasuruan