Extend volume greyed out

Extend Volume greyed out in Windows Server 2019

In Windows Server 2019 native Disk Management, there is built-in Shrink Volume and Extend Volume functionalities that can be used to change size of partitioned drives. Many people try to extend C drive with this tool when it is getting full. However, many people feedback that they cannot do this because Extend Volume is disabled for C drive after shrinking D. In this article, I’ll explain why Extend Volume greyed out in Windows Server 2019 Disk Management and how to enable Extend Volume with 1 step.

Extend volume greyed out

Why Extend Volume greyed out

1. Unsupported partition

In Server 2019 Disk Management, Extend Volume feature only supports NTFS partition, so FAT32 and other types of partitions cannot be extended.

Shrink Volume grayed out

Drive D is FAT32 in my test server, so Extend Volume is grayed out when right click it.

2. No adjacent Unallocated space

Extend Volume only works when there is adjacent Unallocated space on the right side.

Extend Volume grayed out

From the screenshot of my test server:

  • Extend Volume is disabled for C drive, because the 20GB Unallocated space is nonadjacent.
  • Extend Volume is greyed out for drive D, because Unallocated space is on the left side.

How to enable Extend Volume

No matter which reason that cause you unable to extend C drive, you can solve this problem easily with NIUBI Partition Editor. When Extend Volume greyed out because of nonadjacent Unallocated space, you just need 1 step to move partition, and then Extend Volume is enabled.

Download NIUBI Partition Editor, the right side is very similar with Disk Management.

Unallocated space

Right click drive D and select Resize/Move Volume, in the pop-up window, drag middle position rightwards.

Move drive D

Unallocated space is moved to behind C drive. Now Extend Volume is enabled for C drive in Disk Management.

Unallocated moved

You may continue to add this Unallocated space to C drive with NIUBI Partition Editor.

Right click C drive and select Resize/Move Volume again. In the pop-up window, drag the right border rightwards.

Extend C drive

Unallocated space is combined to C drive. This software supports both NTFS and FAT32 partitions. So if you cannot extend FAT32 partition with adjacent Unallocated space in Server 2019 Disk Management, simply run NIUBI to combine this space.

C drive extended

Better solution to extend partition

Server 2019 Disk Management has the ability to change partition size, but it is very limited. When shrinking a volume:

  1. Only NTFS partition is supported.
  2. It can only generated Unallocated space on the right side.

Comparing with Disk Management, NIUBI Partition Editor has advantages while extending a drive:

  • NIUBI can extend a drive with Unallocated space on either side.
  • NIUBI can move partition, so it can extend a drive with both contiguous and nonadjacent Unallocated space.
  • Free space inside of other drives in the same disk can be use to extend partition, too.

Watch the video how to extend C drive by shrinking D and other drives:

As you see, it is very easy to fix Extend Volume greyed out issue in Windows Server 2019 with NIUBI Partition Editor. Besides resizing and moving disk partitions, it helps you do many other disk and partition management operations.

Download to try