By Ivy / Last Updated September 9, 2019

Real case about Extend Volume is disabled

After using my computer for a period of time, my C drive is full. Thus, I deciede to extend it in Disk Management. However, after I right click my C drive under Disk Management window, all I see is Extend Volume grayed out. Are there any suggestions to fix it?

Extend Volume Is Disabled

When will Extend Volume not work properly in Disk Management?

Below is some situations Extend Volume work properly in Disk Management. See it, and then I will tell you when it will not works as usual.

1. Extend Volume only works on NTFS partition or RAW.

2. Extend Volume only works with unallocated space.

3. Extend Volume only works with adjacent unallocated space to the target partition.

4. Extend Volume only works with the right adjacent unallocated space to the target partition.

To sum up, if you want to use Disk Management to increase your partition, your target partition needs to be NTFS partition or RAW. And your unallcated space must be right adjacent to your target partition. If your partition cannot match any of these factors, Disk Management will not work as normal.

To fix it, some users try to shrink D: drive to get the unallocated space. However, you will find the unallocated space you get is right adjacent to D: drive instead of C: drive. That's to say, if there is no unallocated space before you want to extend C drive, you cannot get any availabe unallocated space unless you delete the next partition. If you choose to delete D: drive, you must lose your data on it.

Deleting partition is really a difficut decision for the majority of people. If you do not want to delete you partition, continue to see below and I will show you the alternative software. It will overcome the limitaions in Disk Management and help you extend your partition effortlessly.

How to fix Extend Volume is disabled in Windows 7/8/10 for C drive?

Powerful partition manager: AOMEI Partition Assistant

AOMEI Partition Assistant is a useful software which is designed for Windows users, including Windows 7, Windows 8, Windows 10, etc. It can help you to solve many problems, such as Extend Volume is disabled. And it offers you various chices. If there is nonadjacent unallocated space to the target partition, you can use a powerful function called Move Partition. With it, you can move the unallocated space to the right adjacent side of your target partition. If you just want to get some unallocated space on D: drive, you can right click it and then Resize Partition. And you still can use Merge Partition to increase your partition, even without moving or resize your partition first.

Detailed steps to fix Extend Volume is disabled for C drive

Step 1: Download and install AOMEI Partition Assistant.

Step 2: Enter the main page, right click the target partition and select Merge Partitions.

Merge Partitions C

Step 3: Select the unallocated space or an existing partition with free space, click OK.

Merge C And Unallocated Space

Notice: If you want to merge partitions, you are only allowed to merge two adjacent partitions every time. However, if you decide to merge unallocated space, it's quite a different story. You can merge any unallocated space on the disk.

Step 4: Preview the result and click Apply to accomplish the upcoming operation.

Apply Merge C And Unallocated Space

Step 5: Now, click Proceed and wait for the final result.

From the steps above, you can clearly see that the unallocate space is right adjacent to D drive. But you still can merge your target partition with the unallocated space or partition D. It successfully fixs the limitaions of Disk Management and help you to increase your partition effortlessly.

Downlaod this partition manager for Windows and try it for yourself.


Extend Volume is disabled in Windows 7/8/10 for C drive makes the majority of people feel painful. In Disk Management, you cannot extend partition with FAT32, FAT16, etc. Also, you cannot exxtend partition without right adjacent unallocated space. But if you download the best free partition manager: AOMEI Backupper, you can overcome the limitations in Disk Management. And you have various choices like Move Partition, Resize Partition, Merge Partition, etc. The simplest one is to merge your target partition with unallocated space or adjacent partitons.

Download AOMEI Partition Assistant and enjoy your brand new journey.