From Windows Vista, Microsoft added new Shrink and Extend Volume functions in native Disk Management tool. To a NTFS partition, you can shrink it easily in most cases, but to extend a partition, it isn't so easy. Many people feedback that they cannot extend C drive in Disk Management after shrinking D or other volume. This article introduces why Disk Management cannot extend volume and how to fix these issue.
It is headache if you want to extend a partition in Disk Management without software, because Extend Volume function is always grayed out. For example, in my Windows 10 computer, Extend Volume is disabled for C and E drive after shrinking D. In my another computer, Extend Volume doesn't work even after deleting drive D.
The GUI and functions of Disk Management are exactly the same, no matter you use Windows 10/8/7 or Windows Server 2019/2016/2012/2008. The reasons why Disk Management cannot extend volume has no relationship with Operating System version, but with your disk partition structure.
It seems a bit complicated but it is easy to solve these problem. Firstly, open Disk Management and find out your own disk partition structure, and then follow the corresponding method.
Solution 1: If you cannot extend C drive in Disk Management because Unallocated space is nonadjacent:
Solution 2: If you cannot extend volume in Disk Management because this partition is FAT32 or because of the restriction between Primary and Logical partition, run NIUBI Partition Editor to shrink and extend partition, follow the steps in the video:
Solution 1: If you cannot extend partition in Disk Management because this partition is 2TB, follow the steps in the video to convert MBR disk to GPT:
NIUBI Partition Editor provides basic ability to create, delete, format partition, change drive letter, etc. Advanced ability to resize, move, merge allocated partitions without data loss. Copy, hide, set active, convert, defrag, check partition and much more. Better than other tools, it has innovative 1 Second Rollback, Virtual Mode and Cancel-at-well technologies to protect system and data. It is also much faster because of the advanced file-moving algorithm.