Problem: You have a external USB harddrive/harddisk/hdd which is not getting recognized / detected by your Windows 7 (or Vista) OS. The device manager detects that as unknown USB device (e.g. a "Elements 10B8" one) and asked you to install a driver. Other USB devices like a Keyboard and Mouse (e.g. from Logitech) are working. The HD also worked on another PC (so the HD isn´t broken). But USB HDs do normally not have a driver, as they are part of the OS and couldn´t be installed.

Solution: In that case the reason why the external HD (e.g. a WD / Western Digital Elements 2 TB) is not recognized by the OS might be a corrupt driver store. Perform the following steps to get that issue fixed / solved:

1.) Attach the device to the PC where you have the issue with

2.) Select the unknown device in the device manager, right click on it and choose uninstall (this ensure that the OS need to recheck for the drivers the next time. Otherwise the cached false detection is used!)

3.) detach the device from this PC

4.) Open Windows Explorer

5.) Go to C:\Windows\System32\DriverStore\FileRepository

6.) Search for folder which begins with usbstor.inf

7.) Open it (if you have more than one, choose the most recent)

8.) Copy "usbstor.inf" and "usbstor.PNF"

9.) Paste those two files to C:/Windows/inf

10.) Reboot your pc fully

11.) connect the HD to your PC

The issue should be solved now

You need to have administrator rights on the PC where you wish to perform that

It seamed to be that some USB 3.0 driver caused the issue and deleted the files during the installation. Sometimes the driver installation also failed, but as various other USB devices works most users didn´t care about the error message they got.

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