1. First, open our proxmox server, then click the Datacenter. After that, select the Windows server that we will add the hard disk
2. Click the Hardware menu, then double click Hard Disk. After that, click Resize disk
3. Enter the number of diks that will be added to our windows server
4. Restart Windows Server
5. Log in back to Windows Server
6. Click the Start menu then click Computer Management
7. Click Diks Management, we will see Unallocated disk with the amount we entered earlier.
8. Extend the volume disk
9. Click next
10. Specify the number of disks that will be extended
11. Click Finish
12. Done
