Ensure the software file is in the root directory of the USB and that the file extension is strictly .bin .
If you need help finding the correct firmware, provide the (visible by opening the case), and I can guide you further. qmax mst999 h2 mini 4 software update
: The device will automatically reboot once the installation is complete. Option 2: Online Update (FTP/VF) Ensure the software file is in the root