Solution to Cannot Extend Volume in Windows 7

November 7, 2016

This article will tell you how to solve the problem that cannot extend volume in Windows 7. The AOMEI Partition Assistant can extend volume flexible than Disk Management.


“Is there someone can help me? I an in the Windows Disk Management and I am trying to use the unallocated space to further expand and extend my Windows 7 partition, but the Extend Volume is grayed out, I cannot extend volume in Windows 7. The basic environment of my hard drive is shown as the screen shot below:

Extend Volume

Is the order of my partition wrong? Why I can’t seem to extend partition?”


Disk Management of Windows operating system does have the utility Extend Volume. However, it works with limitation: there must be an unallocated space adjacent to the partition you want to extend, and it must behind the partition. Both conditions must be satisfied, you can use Disk Management to extend partition with Extend Volume. In the scenario, you can see that the unallcated space isn’t adjacent to the C drive, so, when you try to use Disk Management to extend C partition, the Extend Volume greyed out. That’s why you cannot extend volume to unallocated space in Windows 7/8/10.


Fortunately, the free partition manager AOMEI Partition Assistant can rescue the problem. It can extend partition with unallocated space no matter wherever it is located.

Step1. Download AOMEI Partition Assistant, install and launch it. You will see the basic environment of your hard drive on its main interface.

Main Interface

Step2. If you would like to extend C drive with the unallocated space, like the scenario, you cannot use Disk Management to extend C drive with the unallocated space. But here, with AOMEI Partition Assistant, you can do it directly with the function Merge Partitions. Right click the C partition, select Merge Partitions in the pop out menu.

Merge Partition

Step3. Then, tick the box before C partition and the unallocated space. Click OK.


Step4.You will see that the C partition has already been extended with the unallocated space in the main interface. Here, you need to click Apply at the toolbar to execute the task.



AOMEI Partition Assistant can solve the problem cannot extend volume in Windows 7 easily. Actually, besides merging unallocated space to the C partition, AOMEI Partition Assistant provides you many other ways to extend partition, like resize partition, which can help you extend partition when the unallocated space is adjacent to the partition you want to extend no matter it is before or behind the partition. Otherwise, you can use Move Partition to move the unallocated space near to the partition you want to extend, then, use the Resize Partition to make it.

AOMEI Partition Assistant is a remarkable partition manager software that you can use to create partition, delete partition, format partition, wipe hard drive, etc. If you need more features, you can upgrade to Professional edition.