What should I do if the win7 computer mobile hard disk does not display the drive letter?

  

First open the Start menu and right click on the Computer button to open the administration.

Click Device Manager to find the USB mass storage device and right click to launch. If this method does not solve the problem, continue to use the following method to solve.

Click on Disk Manager in Computer Management, right click on the mobile hard drive and click on Change Drive Letter and Path.

Click Change in the pop-up window to select a new drive letter.

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