In Windows 10 Disk Management, right-click the partition that you need to delete and choose “Delete Volume”.

In such a condition, you can delete the partition(s) between the to-be-extended partition and the unallocated space. The unallocated space is on the right of the partition that you’ll enlarge, but there is a partition (partitions) between them. Here list different situations and corresponding solutions of Windows 10 Disk Management “Extend Volume” greyed out. To enable “Extend Volume” function in Windows 10 Disk Management, there should be unallocated space adjacently behind the to-be-extended partition and the goal partition should be formatted with NTFS. Why is “Extend Volume” option greyed out in Windows 10 and how to fix it? Why I can’t extend C drive with unallocated space? Is a way to fix Extend Volume greyed out? Any advice is appreciated!” I right-click C drive but only find that Extend Volume option is disabled. I shrink D drive and get unallocated space behind D drive. I try to extend C drive in Disk Management as I find that it is almost full. Extend Volume greyed out in Windows 10 Disk management

Extend partition windows 10 greyed out