How to merge Unallocated space in windows 10?

This article introduces how to combine Unallocated space in Windows 10 with built-in Disk Management and 3rd-party software. Partition software can merge Unallocated space into C drive by moving partition.

How to get Unallocated space?

There are two ways to get unallocated space: delete volume and shrink volume. In all Windows Operating System, you can delete a volume by Diskpart cmd or Disk Management, the disk space of this volume will be changed to Unallocated. In Windows 10 Disk Management, you can also get unallocated space with Shrink Volume function. It is very useful if you forget to edit disk partition when installing Windows 10, so you can shrink C drive to release Unallocated space to create new volumes easily.

Merge Unallocated space in Windows 10 Disk Management

It is very easy to combine unallocated space to other volume in Disk Management, but there is limitation, steps:

1. Right click Windows on bottom left corner and select Disk Management.

2. Right click the volume with adjacent unallocated space and select Extend Volume

Extend volume

3. Extend Volume Wizard will be opened, simply click Next to continue.

Extend volume wizard

4. Select available unallocated space, click Next to continue.

Select disk space

5. Click Finish to complete the extending.

Finish extending

Check again in Disk Management. Yes, Unallocated space merged into C drive.

Unallocated merged

The key limitation of Windows 10 Disk Management is: the unallocated space can only be merged to the left adjacent volume. In the screenshot, if you right click drive C: and E, Extend Volume is grayed out.

With free partition software such as NIUBI Partition Editor Free, it is much easier to merge unallocated space in Windows 10.

Combine Unallocated space with free partition manager

With the help of NIUBI Partition Editor, you can merge unallocated space to any adjacent or non-adjacent volumes in the same disk. To better explain how to merge the unallocate space, I divide into 2 sections.

Merge Unallocated to adjacent partition

DownloadNIUBI Partition Editor Free (NPE) and follow the steps.

Combine to left adjacent partition

1. Right click volume D and select Resize/Move Volume.

Merge to left

2. In the pop-up window, drag right border rightwards.

Drag to merge

Drag to merge

The unallocated space will be merge to the left adjacent partition.

Unallocated merged

Combine to right adjacent partition

1. Right click volume E and select Resize/Move Volume.

Merge to right

2. In the pop-up window, drag left border leftwards.

Drag to merge

Drag to merge

The Unallocated space will be merged to the right adjacent partition.

Unallocated combined

Merge Unallocated space to extend C drive

When C drive is running out of space, many people try to extend it under Disk Management, but encountered the problem that cannot extend C drive in Windows 10 due to Extend Volume grayed out. With this free partition manager software, this problem can be solved easily by merging the Unallocated space, steps:

Step 1: Right click D and select Resize/Move Volume.

Resize volume

In the pop-up window, drag middle position rightwards to move it.

Move volume

Unallocated space will be move to behind C drive.

Move unallocated

Step 2: Right click C drive and select Resize/Move Volume again, in the pop-up window, drag right border rightwards to hold the unallocated space.

Extend volume win10

Step 3: Click Apply on top left to execute, C drive will be extended by merging the Unallocated space.

Unallocated merged

To merge Unallocated space in Windows 10, free partition manager is better choice. Besides resize and merge partitions, it helps do many disk partition management operations. Learn More

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