There is an Extended partition outside of the Unallocated space and drive E.

After deleting, disk space of original D is not Unallocated but Free.

If you take a good look at the screenshot, you'll find something different: There are two Logical partition: D and E.Įxtend Volume greyed out after deleting D. Shrink drive D and combine Unallocated back to D again? Microsoft made a not funny joke.Īs you see, in my Disk 0, there are two Primary partitions: System Reserved and C. It seems to be not big problem, but, Extend Volume can only combine adjacent Unallocated space to the left partition. Disk Management can only generate Unallocated space on the right side for you. You cannot choose to make Unallocated space in front of of end of this partition. When shrinking a volume, the only option for you is entering an amount or clicking Shrink to use default maximum available unused space. This is the most common reason why Extend Volume greyed out. Reason 2: Unallocated space is not behind That means, Extend Volume is not workable if you do not shrink or delete other partition first. If possible, you may also delete an allocated partition, and then all its disk space will be convert to Unallocated. Unused space cannot be transferred to other partitions directly, you should shrink it and convert part of used space to Unallocated first. The usable space include unused space in other partitions, or Unallocated space. Of course it is impossible to a physical component. Reasons why Extend Volume greyed out in Windows 10 DMīefore extending a volume, there must be usable space in the same disk (or RAID array), otherwise, a 250GB hard disk will be increased to 300GB.

Find out the same reason with yours and use corresponding solution. In this article, I'll shows you all probable reasons why Extend Volume greyed out in Windows 10 Disk Management. Besides basic ability to delete, format and create new partition, Windows Disk Management tool has advanced Shrink and Extend Volume functions to help resize disk partition without losing data.īoth functions are easy to use, but many feedback that Extend Volume is always grayed out even after shrinking another partition.

Extend partition greyed out