Updating Firmware Problems

Maybe the USB cable is bad. I also had problems until I changed my cable.

 

It was a cable problem for me. Try as many cables as you can.

 

I had this problem when I couldn't find my original Zoom cable. Not all USB C cables are the same. Many ONLY provide power for recharging. You need a USB cable that not only provides power, but exchanges data between the computer and your G3Xn. Perhaps you mistook a 'power only' USB C cable for your original Zoom cable like I did. It was a frustrating issue to troubleshoot. Hope this helps.