"I have a problem with resizing my partition C on Windows 8.1. It only has 28 GB and I have run out of every space. The Disc manager for resizing partitions is not working (every option for a Disc C is greyed out). I downloaded three partition managers: Paragon, Aomei and one more (don't remember the name, cause I deleted it already). All of them were supported by Windows 8.1 32 bit. And still it was not possible to do anything with the disk C, even though I have a lot of unallocated space to use. "
- Open Disk Management. Right click the partition you want to shrink and select “Shrink Volume”.
- Specify the size you want to shrink from the partition. Then, click “Shrink”.