

Step 1: Run MiniTool Partition Wizard Free Edition. Let’s see the details about how to increase partition C with one unallocated space. By it, many issues can be solved, for example, rebuild damaged MBR, recover lost partition, format corrupted disk, solve low disk space issue and more. It is award-winning by many users all over the world because of its powerful features. What if there is a failure to extend C drive with unallocated space? Under this circumstance, MiniTool Partition Wizard can help you to move unallocated space to C drive with ease. However, extend volume greyed out issue will appear when using this free tool if you extend C drive to unallocated space which is on the left or far away from C partition.

Generally, Windows Disk Management is the first option. Therefore, many computer users choose to extend C drive. In Windows 10/8/7, low disk space issue always happens to your computer, which can make your PC run very slowly.

Here, we will show you how to move unallocated space to C drive. Or if you need to create a new partition, the unallocated space is also useful. How can you make full use of the unallocated space? If your disk partition is running out of space, especially C drive, you can add unallocated space to C drive to increase the partition size. As to unallocated space, it refers to the volume which is not formatted and where no data can be written. On a hard drive, it can contain primary partition, logical partition, free space, and unallocated space.
