To Manually Assign a Letter to Your USB drive:
1. Click the Start Button, choose Settings, then click Control Panel.
2. Double-click Administrative Tools.
3. Double-click Computer Management.
4. In the left panel, expand Storage and click on Disk Management.
5. Select the removable drive or USB device.
6. Right-click it and choose Change Drive Letter and Paths.
7. Click the Remove button, and click Yes to the warning if you are sure you have your removable drive selected.
8. Right-click the removable drive again and choose Change Drive Letter and Paths.
9. Click the Add button and choose a drive letter not already in use from the drop-down list. If you are not sure what letters are not in use, look at My Computer.
10. Click OK.
11. Click the “X” at the top right corner of the Computer Management Window to close it.
12. Click the “X” at the top right corner of the Administrative Tools Window to close it.
From now on, whenever you insert that drive into that computer, it will always use the drive letter you have assigned it.
Tags: Microsoft Windows, USB