How to Change Partition Size in Windows 11 Without Losing Data

by John, Updated on: November 6, 2021

Disk partitions are created while installing operating system or by computer manufacturer. Many people ask the question if it's possible to change partition size in Windows 10 computer without losing data or reinstalling OS. Because many people encountered disk space issue after running the computer for a period of time. For example, system partition C is small and becomes full, some people want to decrease D/E and increase C drive. In some computers, there's only C drive on system disk, so users want to shrink C drive to create more partitions. In this article, I'll introduce how to decrease and increase partition size in Windows 11 laptop/desktop/tablet without losing data.

Decrease and increase partition size in Windows 11 Disk Management

The same with previous version, Windows 11 has native Disk Management tool to help change partition size. In most cases, it can adjust partition size without losing data, but it is not 100% safe. My partitions are damaged several times when shrinking partition with this tool. If there are both Primary and Logical partitions on a disk, take care of data. If you want to change partition size for Windows 11 computer without any software, you may try Disk Management, but your disk partition configuration must meet the requirements.

How to decrease partition size in Windows 11 using Disk Management:

  1. Right click Windows logo on taskbar and then click Disk Management in the list.
  2. Right click a NTFS partition and select "Shrink Volume" option.
  3. Enter an amount of space to shrink. (Note: 1024MB=1GB, if you don't enter an amount, the maximum available free space will be used by default.)

How to increase partition size in Windows 11 using Disk Management:

  1. Right click the right adjacent partition (such as D:) and select "Delete Volume" option.
  2. Right click the left adjacent partition (such as C:) and select "Extend Volume" option.
  3. Follow up the pop-up Extend Volume Wizard via several clicks.

Restrictions to change partition size with Windows 11 Disk Management:

  1. It can only decrease and increase NTFS partition, FAT32 and any other partitions are not supported.
  2. It can only make Unallocated space on the right side when shrinking a partition.
  3. It cannot shrink a partition beyond the point where unmovable files are located. That means, you can only shrink little space even if there's large amount of free space in this partition.
  4. It can only extend a NTFS partition when there's adjacent Unallocated space on the right side.

In Windows 11 Disk Management, you cannot increase a partition by decreasing another one. For example, after shrinking D drive, Unallocated space is on the right of this partition. It is nonadjacent to C drive and is on the left side of E drive, therefore, Extend Volume option is grayed out.

Extend Volume greyed out

Change partition size in Windows 11 with free partition tool

To change partition size in Windows 11 laptop/desktop/tablet, NIUBI Partition Editor is better choice, because it has many advantages than Disk Management such as:

  1. It is able to resize both NTFS and FAT32 partitions.
  2. It can make Unallocated space on either left or right side when shrinking partition.
  3. It can shrink a partition to minimum size even if there are unmovable files.
  4. It can add Unallocated space to either adjacent partition by one step.
  5. It can move Unallocated space and combine to nonadjacent partition on the same disk.

Better than other third party software, NIUBI Partition Editor has innovative 1-Second Rollback, Virtual Mode and Cancel-at-well technologies to protect system and data. It has free edition for Windows 11/10/8/7/Vista/XP home computer users. Besides the ability to change partition size in Windows 11/10/8/7/Vista/XP, this tool helps you move, merge, convert, clone, defrag, hide, wipe partition, scan bad sectors and much more.

Download the free edition, you'll see disk partitions with structure and other information on the main window.

NIUBI Partition Editor

How to decrease and increase partition size in Windows 11 with NIUBI Partition Editor:

Watch the video how to adjust partition size in Windows 11 with NIUBI:

Windows 11