If a drive is missing on your device, it could be a letter assignment issue. Follow the steps below to using PowerShell to quickly assign a new letter. Step 1 Search for Windows PowerShell in the start menu, right-click the result, and select Run as administrator. Step 2 Run the following command to get the disk information Get-Disk Step 3 Run the following command to get the partition information Get-Partition -DiskNumber 1 Step 4 Run the following command to assign the drive letter Get-Partition -DiskNumber 1 -PartitionNumber 2 | Set-Partition -NewDriveLetter Z In the above command, replace the following; 1 with the Drive Number you want to assign letters 2 with the Partition Number you want to assign letter Z with the Drive Letter you want to assign Once you’ve completed the steps, the hard drive will now appear in File Explorer.