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