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The problem maybe that device is not inserted to PC, or you should wait for a while.
2. You'd better backup the data in your device to a reliable memory device before upgrade.
3. The upgrade process may destroy the data in your device, please backup them first.
4. You should obtain our firmware from official web of the manufacturer rather than lawless webs.
5. Please contact the distributor for other problems.
7.Appendix：USB Device Install
If your PC has never been installed such USB Device, you need to do this. Please see the following
steps:
Select " No, not this time", click" next"
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