diskpart

Disk, volume and partition manager. More information: https://learn.microsoft.com/windows-server/administration/windows-commands/diskpart.

• Run diskpart by itself in an administrative command prompt to enter its command-line:
  diskpart
• List all disks:
  list disk
• Select a volume:
  select volume {{volume}}
• Assign a drive letter to the selected volume:
  assign letter {{letter}}
• Create a new partition:
  create partition primary
• Activate the selected volume:
  active
• Exit diskpart:
  exit