Why the USB port can not work normally sometimes? Why the screen data can not be downloaded successfully through the USB flash drive? This problem can be solved when the USB flash drive is removed again or after the connecting PC is restated again. Why?
This kind of problem is related to OS (Operation System) compatibility issues. It means that USB driver may be not compatible with the users’ OS. When this kind of problem occurs, we suggest that the users should download the screen data via the COM ports.