By Cherry / Last Updated May 15, 2020

Windows 10, as the newest Windows operating system, is attracting to users. Many people upgraded their Windows 7/8 to Windows 10 and they faced the new problems at the same time. Partition Windows 10 is a big problem. For example, The system partition could be not enough to use with the usage of computer, and it would slow down the running speed of computer. Thus, extend system partition is necessary.

Disk Management Extend Volume grayed out

Windows 10 operating system has a tool Disk Management to solve many disk problems. It has many features such as Create Volume, Extend Volume, Shrink Volume, and so on. To increase more space for drives, you can use the Extend Volume of Disk Management to extend it. However, Disk Management has a fatal weakness, it can only use the Extend Volume while there is an unallocated space adjacent to the drive’s right side, otherwise, the Extend Volume would be grayed out so that you cannot use it.

Well, you may think about finding a third-party software to help you. It is a wise idea, and there are many software online. Which one is the best one?

Partition Windows 10 in free

Comparing with all the partition managers, here we truly recommend you AOMEI Partition Assistant Standard, a freeware for managing Windows PC operating system including Windows 10/8.1/8/7/Vista/XP. You can use it to resize partition, split partition, create partition, delete partition, format partition, copy partition, convert data disk between MBR and GPT partition styles, Create WinPE bootable media, Windows To Go creator for Windows 8/10, etc, all in free. It can solve almost all the partition problems in free.

How to extend volume in free while Windows 10 Extend Volume of Disk Management grayed out?

To extend volume while the Extend Volume of Disk Management grayed out, you need to get help from AOMEI Partition Assistant Standard. With its help, you can make it easily and simply. Take the system extending as an example.

First, you need to download this freeware, install and launch it. The main interface is shown as the following picture. You will find out that there isn’t any unallocated space adjacent to the system partition.


Method 1. You can use Merge Partitions to merge C: drive and its neighbor D: drive to increase the C: drive’s volume. Right click C: drive, select Merge Partitions.

Method 2. The D: drive has a lot of free space, to extend C: drive, you can move some free space from D: drive to C: drive. Right click D: drive, select Resize Partition/Split Partition to move out some free space, then, right click C: drive, select Resize Partition (if the unallocated space is next to it) or Merge Partitions to increase system partition’s volume.

Method 3. Use the Extend Partition Wizard, which is at the left side of the main interface. Just click it and follow the guide.

Click Apply to submit the operations you did.

AOMEI Partition Assistant Standard is a good partition manager not only because it’s free, but also the great powerful features. With its help, partition Windows 10 evenpartition Windows 10 USB drive would be a simple thing. Change drive letters, hide partition, check partition, etc, you can do all the things for Windows 10 in a few steps.