How to Extend the System Volume (Disk C:) on Windows 10 PC

In this guide we will explain what to do if you encounter problems with low disk space on the system partition. Before you resize volumes make sure disk C: is not filled with junk, obsolete or useless files. 

Extending the Windows 10 System Volume (Disk C:) in Aomei Partition Assistant

Right-click the partition you want to shrink and select Resize Partition:

Reduce the size and click OK:

This operation will reduce the size of a non-system volume and leave an unallocated space before it.

Now right-click the system volume (Disk C:) and select Resize Partition:

Expand the disk and press OK:

Click on Apply button to apply the changes:

Click Proceed to start repartitioning the disk:

How to Add Space to Disk C: in MiniTool Partition Wizard

You can do the same in any other freeware program for Windows 10. Here is an example with MiniTool’s utility.

Right-click the partition you want to take space from and select Move/Resize:

Reduce the size and press OK:

Then right-click the system volume (disk C:) and select Move/Resize:

Expand the system disk and press OK:

Press Apply:

and Yes:

This message means everything is done:

How to Expand Disk C: on Windows 10 PC Without Third-Party Apps

You can extend your system volume using the Windows 10 built-in tool. It is not so flexible but nevertheless you can perform basic operations.

If you need to expand disk C:,  you may choose from two methods:

1. Shrink the volume and then expand another one;
2. delete a non-system volume and then add the free space to the first one.

1. Launch the explorer:

2. Right-click This PC and select Manage:

3. Go to Disk management.

4. Right-click the volume you wish to delete and click Shrink… or Delete volume… depending on your choice:

5. Press Yes:

6. Now right-click the unallocated space and select Extend Volume…:

7. Specify the amount of space you wish to add to your disk C (all or a part) and click Next:

8. Press Finish:

The system volume has been extended:

Conclusion

Now you know multiple methods to manage partitions on your hard drive or SSD. As a rule, third-party apps are more flexible and provide more features. 

But nonetheless, if you are currently unable to download any software, you can still increase the size of your disk C: using Windows 10 built-in applet.  

Related articles:

• How to split the disk in Windows