Unknown Usb Device Device Descriptor Request Failed. There are two basic troubleshooting methods Unknown USB device error is a very common error. As you have noticed, the USB Device in Device Manager has a yellow triangle on it The Unknown USB Device error says Device Descriptor Failure or Device Descriptor Request Failed, and a USB device is no more recognized by the Windows.
Make sure that you follow all the steps given above carefully. This can also happen with an SD Card and the computer will no more read the SD card when it is inserted in the card slot. It really doesn't matter whether you use a USB hard drive or a USB flash drive; in both cases, you're likely to come across the Unknown USB Device (Device Descriptor Request Failed) error.
There are two basic troubleshooting methods Unknown USB device error is a very common error.
A request for the USB device descriptor failed'.
Unknown USB Device (Device Descriptor Request Failed). You can fix unknown USB Device error by using the Hardware & DevicesTroubleshooter. Tried everything like uninstalling, updating etc as the information on the internet.