In your Windows operating system based computer, you have seen many applications and programs. You can also use external peripherals to the Windows to access the computer files or for transfer purpose. Sometimes when you upgrade your older version of Windows to Windows 10, you will see many error issues or problems like USB stick not recognized after upgrade. It is really a very vicious issue that should be rectified as soon as possible. You will see that after the occurring of this issue, the computer will not permit you to transfer any files to the computer or from the computer. Therefore, you should go through some manual or automatic error fixing method to fix USB stick not recognized problem.