180823s.7z -

Installing the wrong firmware version can "brick" (permanently disable) your hardware. Ensure this specific file version matches your device's model number and processor type before proceeding.

To help you further, could you tell me you are trying to update or where you sourced the file? 180823S.7z

mcu.bin (Microcontroller unit firmware for hardware control). readme.txt (Installation instructions). Common Installation Procedure 180823S.7z