Adding an Additional Drive to an Existing VM in Hyper-V

Create a New Virtual Hard Disk

1. Select the virtual machine.
2. In the Actions pane, click on Settings.
   
3. Click on SCSI Controller.
4. Select Hard Drive then click Add.
   
5. Click New to create a new virtual hard disk.
   

Configure the New Hard Disk

1. Select Dynamically expanding.
   
2. Enter a name for the additional drive and save it in the VM’s existing Virtual Disk folder.
   
3. Adjust the disk size as needed.
   
4. Review the virtual disk information and click Finish.
   

Initialize and Configure the New Disk

1. Open Server Manager.
2. Navigate to File and Storage Services > Volumes > Disks.
   
3. Right-click on the new disk and select Bring Online.
   
4. Right-click again and select Initialize.
   
5. Right-click once more and select New Volume.
   
6. Assign a drive letter and click Next.
   
7. Enter a Volume label and click Next.
   
8. Review the volume information and click Create.
   

Verify the New Volume

1. Open File Explorer.
2. Click on This PC to ensure that the new drive appears and is accessible.