You may view your hard drive in Disk Management and realize there are unallocated spaces. The space will be on the hard drive, but Windows cannot use it. It is like having a spare room in your house ...

For any partition management work, there are many free third-party tools available, but Windows includes a pretty good Disk Management Tool that should suffice you for most of your disk management ...

Just replaced my 256GB boot NVME with a 2TB boot NVME. I cloned the drive before replacing so I wouldn't have to do a fresh install. But now I'm realizing that the built in Disk Management tools don't ...