Increase C drive space

How to make c drive bigger without reinstalling

Recently some Windows 10 users ask me whether it is possible to make system C drive larger without reinstalling Windows, because C drive is running low on space. Yes, it can’t be better if you can make C: drive bigger without starting from scratch. Actually, it is very easy to achieve. In this article, I’ll show you how to shrink volume and move Unallocated space to make C drive bigger. The methods are valid for Windows 10/8/7/Vista/XP and Server 2016/2012/2011/2008/2003 (32 and 64 bit).

Make C drive bigger

Which partition software is safe?

Before starting, you should know that there is risk of losing data while resizing disk drives. Different with read-only program, to change partition size, all partition software should modify all related parameters of disk, drive and files in MBR, DBR and other places. So anything that cause part of parameters failed to be modified, you cannot boot into Windows or lose data.

Few people know or pay enough attention to this risk. In laptop or desktop, there are precious family photos, work projects and other files. In a server, there are large amount of files that cannot be lost. So it is disaster if partition software cause damage.

Because of the built-in innovative 1 Second Rollback technology, NIUBI Partition Editor is the only Windows partition software that can ensure 100% system and data safe. If any software error or hardware issue is detected, NIUBI Partition Editor can automatically roll back to original status in ONE second. If it happens, nothing will be changed or lost. Your computer or the server could back online without damage rapidly.

When you begin to repartition disk drive, the first thing you should concern is not how many functionalities or how beautiful the partition software is, instead, you should take care of your data.

Shrink D to make C drive bigger

In almost computers or servers, there is another adjacent volume D and there is plenty of free space in it. So you can shrink it to release free space, and then add the free space to C drive. To do this, you just need to click and drag with NIUBI Partition Editor.

Step 1: Download NIUBI Partition Editor, right click D: drive (or other volume that is behind C:) and select Resize/Move Volume.

Shrink D

In the pop-up window, drag left border rightwards to shrink D.

Shrink D

Part of free space is released from drive D and displays as Unallocated space behind C drive.

Unallocated created

Step 2: Right click C drive and select “Resize/Move Volume” again. In the pop-up window, drag the right border rightwards to merge the Unallocated space.

Extend C drive

Step 3: Click Apply on top left to execute, done. C drive is increased to 59.4GB by adding 20GB free space from D.

C drive extendedTips: the operations listed below Pending Operations with can be done in Windows without reboot.

Merge Unallocated space to make C drive larger

In Windows Vista and later versions, there is advanced Shrink Volume and Extend Volume functionalities in Disk Management snap-in to resize partition. Some people try to shrink D or delete the volume behind D to get Unallocated space, but Extend Volume is disabled for C drive. In this situation, you can move and merge the Unallocated space to make C drive bigger.

1. Right click drive D and select Resize/Move Volume, in the pop-up window, drag middle position of D rightwards, and then the Unallocated space will be moved to the left side at the same time.

Move volume D

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

Extend C drive

NIUBI Partition Editor free edition is 100% free for Windows 10/8/7/Vista/XP home users. (To build bootable media or enjoy 1 Second Rollback technology, you need professional edition).

For Windows Server 2016/2012/2011/2008/2003 administrators, you need server edition or enterprise edition. (Server edition can be registered on 2 server, enterprise edition can be registered to unlimited servers and PCs)

How to make c drive bigger without reinstalling Windows?
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