The MP tool automatically picks the correct one based on the NAND ID. You rarely need to manually select the file, unless you are an advanced user.
It identifies physical defects in the memory chips and "masks" them so the computer never attempts to write to a broken sector. The Lifecycle of Firmware: Production to Recovery firstchip fc1178bc firmware
Write down the Flash ID. This is your fingerprint. The MP tool automatically picks the correct one
: If the dedicated BC tool fails, some users have success with the FC1178/FC1179 MpTools V1.0.5.2 . 3. Steps to Flash the Firmware firstchip fc1178bc firmware