Can anyone help? I want to extend the volume space in OS installed drive, but the Extend volume option in not appearing. For other drives it’s working perfectly. How to extend my C: Drive volume?

I suggest you to follow the steps below

1. Run Disk Management. Open Run Command (Windows button +R) a dialog box will open and type “diskmgmt.msc“.
2. In the Disk Management screen, just right-click on the partition that you want to shrink, and select “Extend Volume” from the menu
3. Locate your system partition — that’s probably the C: partition. Right-click on it and select “Shrink Volume.” If you have multiple partitions on your hard drive, you could also choose to resize a different partition to free up space.