Unallocated Disk Space can be assigned its own volume letter or used to extend another drive. Types of Partitions are also explained.

Use Disk Management The first and probably easiest way to view the status of one or more drives is to use Disk Management. See How to Open Disk Management if you've never worked with this tool before.

Learn how to safely delete Recovery Partition in Windows 11/10. If your hard disk has multiple Recovery Partitions, you can delete the useless one.