The ‘Add Drive Letter or Path' window appears.The ‘Allow access to this volume by using the following drive letter and paths' screen appears.Right-click it and choose ‘Change Drive Letter and Paths' from the contextual menu.There should be a hard drive with the name (Disk a Partition a) without a volume letter such as C, D, or E.Locate the Disk Management option below Storage and click it.Enter ‘Computer Management' in the text field and press Enter.Click the Windows icon on the desktop to open the Start menu.