Sometimes USB mass storage devices not detected on your computer or laptops. The pen drives, external hard disks are not detected as it may be blocked by your administrator for security reason.
What is the problem?
USB Mass Storage devices not detected:
In this article learn how to enable USB mass storage device by making little change in the windows registry settings.
Identify the problem:
The USB Mass Storage devices not detected as the registry key Start (under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USBSTOR) value is set to 4. To enable USB Mass Storage devices, need to change this to 3.
Follow the below steps to enable the USB Mass Storage devices.