If you got a problem with upgrading.
Please carefully read this tutorial video " How to upgrade your firmware version " and when you upgrade kindly note the following tips in the picture.(Many users ignore the Tips below）
And If which step still can't work, kindly film a video of the case to help us located the problem. Thanks!
（1）Note: The firmware name could be 'upgrade.bin(1)' or 'upgrade.bin(2)' if you have downloaded the firmware before. Always make sure to rename it as 'upgrade.bin', or else the device might not be able to detect and read it in the next step.
（2）Note: Make sure that you manually click 'Enter Upgrade Mode' on the device, so that the device can be recognized as a virtual disk on the computer.
（3）Note: You don't need to open the firmware file. Simply dragging it into the virtual disk will be ok.