Move Unallocated space on Windows 10

Updated on: May 17, 2019

This article introduces how to move Unallocated space in Windows 10 (32 & 64 bit) without losing data. Drag and drop to move Unallocated partition next to C drive or end of disk.

Unallocated is blank disk space and not belong to any partition, you can get Unallocated space by deleting or shrinking a volume in Windows 10 Disk Management or by 3rd party partition software.

The most common issue in Windows 10 is C drive getting full, so many people try to shrink D to get Unallocated space and then extend C drive with the built-in Disk Management tool. After shrinking D drive, Unallocated space is nonadjacent to C drive, so Extend Volume is greyed out. In this situation, you need to move Unallocated space next to C drive, then Extend Volume will be enabled.

In fact, no matter you want to move Unallocated space next to C drive, move rightwards or to the end of disk, it is very easy. In this article, I'll introduce the easiest way to move Unallocated space for Windows 10 computer inside a disk by dragging and dropping.

Move Unallocated space next to C drive

Download NIUBI Partition Editor, as you see, there is 20GB Unallocated space behind drive D.

NIUBI Partition Editor

Right click drive D and select "Resize/Move Volume", drag middle position rightwards in the pop-up window.

Move drive D

Then Unallocated space is moved next to C drive.

Move Unallocated

Now this Unallocated space can be combined into C drive.

Right click drive C and select "Resize/Move Volume" again, drag right border towards right in the pop-up window.

Extend C drive

Click Apply on top left to execute, done.

Extend volume C

This software works in virtual mode to avoid mistake, real disk partitions won't be modified until click Apply to confirm.

Move Unallocated space to right side

Disk Management Extend Volume can only combine Unallocated space to the left adjacent partition. So, if you want to shrink D to expand the right partition E, it is impossible with this built-in utility. In this situation, you can merge Unallocated space to E: drive without moving to the right side.

Right click drive E: and select Resize/Move Volume, drag left border towards left in the pop-up window:

Drag to extend

If you want to combine this Unallocated space to another partition F (behind E:), you need to move Unallocated space from left of E to the right side. Similarly, right click drive E and select "Resize/Move Volume", drag right border towards left in the pop-up window.

Move unallocated partition

Move Unallocated space to end of disk

If you want to merge Unallocated space to the end partition in the same hard disk, there is no need to move Unallocated space to the end of disk. As I show you above, you can combine Unallocated when it is on the left side.

Only when you want to create new partition in sequence, you may consider moving Unallocated space to the end of disk. (Otherwise, the partition structure is C, D, F, E).

Another way is changing the drive letter of partition E to F, and then create new partition with Unallocated as E.

Watch the video how to move Unallocated space on Windows 10 computer:

Video guide

Move Unallocated to other disk

In some computers, C drive is full but there is no or not enough free space in other volume of the same hard disk. Some people want to move Unallocated space to C drive from another separated disk. It is impossible. A 256GB disk can't be increased to 276GB, because it is a physical unit.

In this situation, you have to copy this disk to another larger one with NIUBI. Extra space in the larger disk will be shown as Unallocated, then you can combine to C drive and other partitions.

How to clone disk and enlarge C drive.

In Summary

To move Unallocated space in Windows 10, run NIUBI Partition Editor to drag middle position towards other side in the pop-up window. If you want to combine Unallocated to any contiguous partition, simply drag the border towards the other side.