There is a brief explanation here: Xiaomi Wifi Router 3G - 18.06.x / Wifi issues 2.4GHz + 5GHz
Unfortunately I think you need programming skills to make use of it. The post from the next person contained the link to a patch for disabling USB 3, but it's no longer available on the server. The code it contained was very different from what LGA1150 posted.
Your problem may be caused by something else, though. I don't think it should happen if you use a USB 2 device.