1 Download the firmware and MCU (on computer) , and copy them to the empty USB disk
(Please Note , the files should in Home directory Formatted USB disk , FAT32 )
2 Plug to USB cable , wait about 5 seconds , it will come out a update notice .
Click wipe data and format the flash
(you need save your important file from the unit before update the unit ,it will wipe all the data files after update)
Important Notice : do not power off the unit while updating
If the steps 3 not happen , you can also go to the unit version , click system update or MCU update