How to solve Extend Volume grayed out problem? On the contrary, Extend Volume become activate again if there is an unallocated space followed, the space become continues makes extend partition possible. Generally speaking, there is no continues space behind the partition you want to extend, or unallocated space. It's unable to extend partition when it grayed out. Extend volume disabled in Windows 10 partition manager- Disk Management. Along with the growing using of Windows 10, partitions may face low disk space problem during frequently use.
