But if you wish to use it as data storage, you can create a new disk volume using the unallocated space in your HDD.įor creating a new disk drive or volume from unallocated HDD space, we will use Disk Management Utility. You can use this unallocated space for dual-booting Windows your PC. Usually while installing Windows on new computers, people either create single disk drive of full HDD space or leave some unallocated space.