How to Make C: Drive Bigger Without Losing OS/Programs

Recently some Windows 11 users ask me whether it is possible to make C drive bigger without reinstalling Windows and programs, because C drive runs out of space. The answer is yes. To make C drive larger in Windows server and PC, you may either use Windows native Disk Management or third party software. Disk Management only works under restricted condition. In this article, I'll introduce how to make system C drive bigger with both kinds of tools.

Make C drive larger with Windows Disk Management

Some people don't like to use third party software, in that case, Windows native Disk Management is an option. However, your disk partition configuration must meet the requirements below:

1. There must be a adjacent partition on the right side of C drive.
2. This right contiguous partition (such as D:) must be Primary.
3. You did not install programs in D: drive, so you can delete it.
4. There's a third partition to save all files in D drive before deleting it.

How to make C drive bigger in Windows 11/10/8/7 and Server 2008 to 2022:

1. Press Windows and R on your keyboard to open Run, type diskmgmt.msc and press Enter to open Disk Management.
2. Right click D: drive and select Delete Volume, then it will be changed to Unallocated space.
3. Right click C: drive and select Extend Volume.
4. Click Next till Finish in the pop-up Extend Volume Wizard window, then Unallocated space will be added into C drive.

Make system C drive bigger with free partition editor

Comparing with Windows native tools, NIUBI Partition Editor has more advantages when resizing partitions:

• It is able to make Unallocated space on either left or right when shrinking a partition.
• It is able to shrink any NTFS/FAT32 and Primary/Logical partition the same disk to get Unallocated space.
• It is able to move and merge Unallocated space to C drive, no matter they are contiguous or not (but should be on the same disk).

To make C drive bigger in Windows 11/10/8/7/Vista/XP, NIUBI Partition Editor has free edition to help you. To make C drive larger in Windows Server 2008/2012/2016/2019/2022, you need Server or higher edition. Better than other tools, NIUBI has innovative technologies to protect system and data.

• Virtual Mode - all operations will be listed as pending for preview, real disk partitions won't be changed until click Apply to confirm.
• Cancel-at-will - if you applied incorrect operations, you can cancel the ongoing operations without damaging partitions.
• 1-Second Rollback - if any error is detected while resizing partition, it automatically reverts computer to original status in a flash.
• It is 30% to 300% faster because of the advanced file-moving algorithm.

Make C drive partition bigger with another hard disk

In few computers, there's no other data volume or not enough free space on the same disk. In that case:

• If you use physical hard disk, follow the steps to copy this disk to another larger one.
• If you want to expand C drive for a virtual machine, follow the steps to increase virtual disk size for VMware or Hyper-V.

Then you can increase C drive space with additional disk space. Besides shrinking and extending partitions, NIUBI Partition Editor helps you do many other disk/partition management operations.

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