3 Freeware to Extend Volume in Windows 10 to Extend C D or Any Volume

Here is a video that introduces a way to shrink large partition and extend volume c without losing data.

Brief summary

Extend volume is a Windows disk management function that is provided in Windows 11/10/8/7 and other systems for users to expand volume size, however when it comes to the c system boot volume, extend volume is disabled by Windows 10. How may we extend volume c or any other volume in Windows 10? This page introduces most safe ways to extend volume without losing data using Extend volume under disk management, diskpart cmd, free partition resizer to do the job.

Here are some cases that you may see which you fit in

  • Delete volume to produce unallocated space and extend volume with the unallocated space
  • Shrink adjacent partition to produce unallocated space, and expand it with extend volume function in disk management;
  • Unallocated space is not next to the one you want to expand? -> Use freeware Partition Resizer Free to move the partition in between and make the unallocated space next to the one you want to expand, the freeware Partition Resize could do the job
  • Extend volume disabled? -> Use freeware Partition Resizer Free that can do the job for you.

Solution 1 - Extend Volume in Windows 10 Disk Management - Extend Volume is Enabled [Video guide included]

When extend volume is enabled, you may use it to extend partition when there is unallocated space adjacent.

The key: unallocated space

How to produce unallocated space -> Shrink large partition to produce unallocated space; or delete the drive next to it to produce unallocated space

shrink volume

Now, you can enter the amount of space to shrink and then click "Shrink" button

enter amount of space to shrink

You can see some unallocated space when the shrinking process is completed.

unallocated space

And then you may claim the unallocated space to extend the adjacent partition using Extend Volume function in disk management.

Note: if the unallocated space is not adjacent to the one that you want to extend partition, you may use freeware Partition Resizer to do the unallocated space moving and extend it with the freeware too.

Video guide - how to delete volume to produce unallocated space next the one you want to extend

Solution 2 - Extend volume with diskpart in Windows 10

Diskpart is a powerful partition manger built in all Windows operating system, so you can run Diskpart command to extend volume in Windows 10. As a powerful Windows built-in partition management tool, you can run Diskpart command to manage hard drive including create partition, delete partition, merge partition, extend partition, formatting partition, etc. Windows 10 Diskpart command is able to take the place of third-party partition magic to manage disk space effectively. And to some extent, Diskpart has more powerful function that partition magic, with which you can set up a dynamic disk or mirror volume, etc.

Table of Contents

Windows 10 Diskpart Extend Volume

When disk partition runs out of space on Windows 10, somebody would like to run Diskpart command to perform partition resizing so as to increase the size of the volume which has not enough free space.

How to extend volume by running Diskpart command in Windows 10?

1. Click "Start" > "Run" > type "diskpart" and click "OK" so as to open the Diskpart command window


2. Type the "list volume" and it will show which volume you can choose to extend the partition that has low disk space. For example, if the list volume shows to select volume 1, you should type "select volume 1". Then, it will show a message saying "volume 1 is the selected volume". Finally, you should type "extend", after which diskpart will extend the selected partition.

diskpart extend volume

In most case, most people do not like to run Diskpart command to extend volume because it is difficult to handle. You have to type each command on the Diskpart command window, which is a complex task for many computer users.

Diskpart Fails to Extend Partition in Windows 10

In fact, some people also realize that it is a common situation to fails extend partition in Windows 10 with Diskpart command. After following the steps above to send out order to extend the selected volume by Diskpart command, many people finally fail to expand the size of selected volume because Diskpart shows a message "The volume you have selected may not be extended. Please select another volume and try again".

diskpart failed to extend volume windows 10

Why Diskpart cannot expand volume in Windows 10?

Here are possible causes why diskpart cannot extend a volume.

  • Diskpart can only extend ntfs volumes
  • Diskpart cannot extend the boot volume of a pc or server
  • No contiguous free space next to the volume you want to expand

Solution: If you failed to extend the selected volume after running Diskpart command on Windows 10, you may use Disk Management to do the job at certain conditions too:

1. Open Windows 10 Disk Management to see if there is unallocated space. If there is no unallocated space, you can right click a volume that has much free space and select "Shrink Volume" option

shrink volume

Now, you can enter the amount of space to shrink and then click "Shrink" button

enter amount of space to shrink

You can see some unallocated space when the shrinking process is completed.

unallocated space

2. Even if there is unallocated space, you have to make sure that the unallocated space is contiguous to the selected volume you want to extend. Diskpart will still fail to expand the selected volume on Windows 10 if there is no contiguous unallocated space.

3. Diskpart cannot extend system partition, so you will fail to extend the selected volume if you run Diskpart command to expand system partition on Windows 10.

4. Diskpart only supports to extend NTFS data volume, which means that you will also fail to extend the selected volume with Diskpart command when you attempt to extend an FAT32 volume on Windows 10.

Solution 3 - Extend volume on Windows 10 with 3 freeware

When you fail to expand size of disk volume on Windows 10 by running Diskpart command, you have another choice to perform partition resizing, namely partition software.

#1 Freeware - IM-Magic Partition Resizer Free is a completely free partition tool which enables you to increase size of system partition and data partition on Windows 10. It supports both NTFS file system and FAT32 file system. This partition software also allows you to shrink volume, move volume, format volume, delete volume and so on.

Video - how to shrink large volume and extend a small volume

More video tutorials are on https://www.resize-c.com/video/

Download IM-Magic Partition Resizer Free Edition (100% free tool on Windows 11/10/8/7)

download free windows 10 partition software

#2 Freeware - Easeus Partition Master Free

Easeus Partition Master Free provides free disk management for users to resize, move, copy, convert disk partitions with easy to use interface. The free version is for home use.

#3 Freeware - Macrorit Partition Expert Free

Macrorit Partition Expert Free is yet another useful disk management tools that provides easy to use disk partitioning functions not limited to move partition, copy partitions, deleted partitions etc.

Last updated on Feb 7, 2023

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