How to Extend Volume with Disk Management in Windows 11/10/8/7?

How to Extend Volume with Disk Management in Windows

After using computer for a long time, you may find your disk partition is constantly running out of space due to the increase of download programs and personal data, especially in C drive. Since the low space of C drive may lead to slow computer performance or other system errors, you may want to release more space by moving folders from C drive to another drive or extend volume to increase the size of C drive.

Disk Management is a built-in disk manager in Windows 11/10/8/7 which can help you extend volume without rebooting your system. It is designed to make you manage your hard drives and partitions in a good order. With it, you can initialize a disk, shrink or extend volume, create or delete partition, convert Windows 10 MBR to GPT disk, etc. Now, Let’s see the detailed steps on how to extend volume in Disk Management:

Step 1. Right-click “window” icon and choose “Disk Management” to open it.

Step 2. On the main interface, right-click on the partition that you want to extend, choose “Extend Volume” and follow the prompts to continue.

Extend volume in Disk Management not working

However, many users complain that they often fail to extend volume in Disk Management Windows 10 even when there is unallocated space on the disk. This issue has bothered them for a long time and interrupted their normal work.

This is because Disk Management has some limitations in enlarging partition:

  • You can only extend partition when there is unallocate space adjacent to the target partition and the unallcated space must locate behind the to-be-extended partition.
  • Disk Management only supports extending RAW and NTFS partition. If the partition you want to extend is formatted with FAT32 file system, “Extend Volume” will be greyed out.
  • You are not allowed to extend volume when there is no unallocated space on your disk.

If you have met any one of the limits above, you won’t succeed in using Disk Management extend volume. If it happens, what could you do? Keep reading, you will get the solution.

Best Disk Management Tool for Windows 11/10/8/7

The best way to solve the “Extend volume in Disk Management not working” issue is to resort to a third-party partition manager. AOMEI Partition Assistant Professional, a versatile partition manager for Windows 11/10/8/7, should be your best choice. It’s featured with various functions to enable you to manage disks and partitions easily and safely.

With AOMEI Partition Assistant, you don’t need to worry about the problems mentioned above. No matter which case you are in, you could always find the relevant methods to solve it in this software. The following contents will show you how to extend volume only in three clicks.

How to Extend Volume Via AOMEI Partition Assistant?

Since AOMEI Partition Assistant is available to almost all kinds of file systems, you can extend partition formatted as FAT32, NTFS, exFAT, RAW, so the methods below will focus on the situations where there is no adjacent unallocated space and there is no unallocated space on the disk.

Method 1. Merge Partition

  • Applies to: Extend volume when the unallocated space is not adjacent to the target partition.
  • Features: It supports merging unallocated space into the target partition or merge two partitions into one.

Step1. Install AOMEI Partition Assistant Professional and launch it. Right-click on the partition you need to extend (e.g. C Drive) and choose “Merge Partitions”.

Step2. Tick the unallocated space and then click “OK”.

Step3. Please click “Apply” button at the top left corner to commit the operation to extend volume.

Method 2. Allocate Free Space

  • Applies to: Extend volume when there is no unallocated space but there are free space on another partition.
  • Features: It supports allocating free space from one partition to anther directly.

Step1. Open AOMEI software, right-click a partition that has enough space (here is D partition), and then choose “Allocate Free Space”.

Step2. Enter the size of free space you would like to add into the target partition (here is C drive), and then click “OK”.

Step3. After previewing the operation to be executed, click “Apply” to save the changes. Then you will extend volume successfully.


This tutorial has shown you how to extend volume in Disk Management. Thanks to AOMEI Partition Assistant Professional, you could extend volume successfully when Disk Management doesn’t work for its limitations. Moreover, AOMEI the popular disk cloning software Windows 10 which can keep your system and data safe by cloning it to another disk. If you have other problems about disks, AOMEI software is always around you to provide help.

Santos Cruickshank

Santos Cruickshank

With years of software development experience under his belt, Santos Cruickshank has always been passionate about learning about different kinds of software for PC and apps for smartphones. Santos Cruickshank has been one of the lead developers for Slack back in 2017 and now works as a freelance software developer. Apart from that, he also loves to write and educate people about software development and how to use them.