By AOMEI / Last Updated September 12, 2019

Why can’t extend partition Windows 10?

You may find the Extend Volume is grayed out under Disk Manage

ment on Windows 10. It is the most common sign of can’t extend partition Windows 10. Why can’t extend partition Windows 10? Although Windows 10 allows you to extend volume using Disk Management, it still requires contiguous unallocated space beside the partition you want to extend. If there is no unallocated space or the unallocated space is not adjacent to the partition you want to extend, the Extend Volume of Windows 10 Disk Management will gray out.

How to fix the “can’t extend partition Windows 10” problem?

The direct way to fix this problem about Extend Volume is grayed out is to create a contiguous unallocated space with Disk Management. Only by this way, you can extend partition in Windows 10 using Disk Management. And in the process, you can not guarantee that the unallocated space you create is adjacent to the partition you want to extend. Therefore, Disk Management has limitations in solving this problem. So it is a priority that finding a powerful tool which has the ability to fix the problem and extend partition in an easy way. After study the relevant tool for partition operation in the market, we find a disk partition software - AOMEI Partition Assistant Professional which meets your demands. It is a disk partition software which has an intellectual user interface. Its well designed wizard make it an easy to use software. And AOMEI Partition Assistant enables you extend partition even the unallocated space is not adjacent to the partition you want to extend. So AOMEI Partition Assistant is the most suitable tool to solve this problem and realize extending partition in Windows 10.

We suppose that you do not have an unallocated space on your disk. And I will show you the detail of how to fix the “can’t extend partition Windows 10” problem.

Step1. Install and launch AOMEI Partition Assistant Professional. Click the Extend Partition Wizard in the left panel of the main interface.

All Tools

Step2. Now we suppose that we can’t extend C partition in Windows 10. So select Extend system partition in the pop up window. And click Next.

Click Next

Step3. Select the partition that you would like to take the free space from(Partition D). Click Next.

Select Partitions

Step4. Specify the new size of the partition you are extending by move the bar. Then click Next.

Extend Size

Step5. Confirm the information which indicates the operations will be executed in the Hard Disk Layout. Then click Proceed to begin the perform.

Proceed

Note: If you have an unallocated space on your Windows 10 hard drive, you can extend partition by merging unallocated space into partition using the Merge Partition function.