1. Make sure your USB drive is formatted as FAT32 and the storage size is less than 64 GB
2. Download the latest firmware file ( with .fxfw as file extension ), copy it to your USB Drive
3. Rename it into autoupdate.fxfw
4. Plug the USB drive into the machine and restart it. The update process will take around 3 - 5 minutes.
Note: If the current firmware is 2.4.1 version or below, the machine cannot be updated via USB. Please re-flash the SD card to update directly.