Hi,

As per the problem description you are unable to access USB memory stick. As all the hardware devices have drivers associated similarly USB devices also have it. Sometimes proper drivers do not get detected after the initial installation so reinstallation of the drivers helps resolve the issues. Let us work together to troubleshoot this problem.

Follow the methods below and check if it works.

Method 1: Run Hardware and Device troubleshooter.

If your computer is having problems with a recently installed device or other hardware, try using the Hardware and Devices troubleshooter to fix the problem. It checks for common issues and makes sure that any new device or hardware attached to your computer was installed correctly.

 Follow the steps given below:

a. Press Windows + W together.
b. Write Troubleshooting in the search box right up corner and hit enter.
c. Click on Troubleshooting tab.
d. Click on view all option on the upper left corner.
e. Select the Hardware and Device options from the list.
f. Click Next to run the Hardware and Device Troubleshooter.

 

Method 2: Uninstall and reinstall all USB controllers, follow these steps:

a. Go to the desktop view.

b. Click Windows key + R, type devmgmt.msc and press enter.

c. Expand Universal Serial Bus controllers.

d. Right-click every device under the Universal Serial Bus controllers node, and then click Uninstall to remove them one at a time.

e. Restart the computer, and then reinstall the USB controllers.

Related articles which can provide you more information:

What to Try When Your USB Device is an "Unknown Device"

Hope this helps. If the issue persists please provide required information and we’ll be glad to assist you.

I found the USB memory stick (Corsair Voyager GT 3.0) I was using worked fine in a USB 2.0 port and failed in a USB 3.0 port, so I installed the most up-to-date USB 3.0 driver for my motherboard and that solved my problem.  Now my USB memory stick works fin in my USB 3.0 port.