Increase C drive space

Increase C drive space in Windows 10

No matter you use OEM laptop/desktop or build the computer DIY, disk space of system C: drive and other data volumes are allocated while buying the computer or installing Operating System manually. Many types of files write in to the disk drives, especially for the system C drive, so they’ll become full some day. What will you do in this situation? Actually, you can increase C drive space in Windows 10 without starting from scratch. If there is Unallocated space or free space inside of other volumes in the same hard disk, you can add into C drive to increase disk space.

To increase C drive free space in Windows 10, there are two choices: Windows 10 native Disk Management and third party partition software such as NIUBI Partition Editor. In this article, I’ll introduce how to increase C drive space in Windows 10 (32 bit and 64 bit) with both tools.

Increase C drive space

Increase C drive with Disk Management

Windows 10 Disk Management has build-in Extend Volume functionality which can be used to increase partition size, but not every drive can be extended. In fact, Extend Volume is restricted and it works only when meeting all requirements below:

  1. Extend Volume is only valid for NTFS and RAW partition, FAT32 and other types of partitions are not supported.
  2. There must be adjacent Unallocated space on the right side.
  3. Free space in Extended partition cannot be added to Primary partition, even if it is right adjacent.

If your laptop or desktop has such disk configuration, it is very easy.

Steps to increase C drive space in Windows 10 Disk Management:

  1. Right click Windows flag on bottom left corner of the screen and then select Disk Management.
  2. Right click C drive and select Extend Volume.
  3. Extend Volume Wizard window will be opened, simple click all Next in this wizard.
  4. Click Finish to begin extending.

If your disk drive does not meet the requirements, you have to use 3rd-party professional partition software.

Note: there is system damage and data loss risk while resizing disk partitions, so it is very important to select a reliable and safe partition software. Integrated with unique 1 Second Rollback technology, NIUBI Partition Editor can ensure 100% system and data intact, this is the reason why it is recommended.

Increase C drive disk space with NIUBI

Download NIUBI Partition Editor and you’ll see all connected storage device with partition layout. In my Windows 10 laptop, there are drive C, D, E and several system reserved partitions. Original drive C is 30GB and D is 50GB. Let’s see how to increase C drive space on Windows 10 by taking free space from D.

Increase C drive Win10

Step 1: Right click drive D and select Resize/Move Volume, drag the left border rightwards or type an amount to shrink it.

Shrink D drive

As you see, 20GB free space is taken out of from D and display as Unallocated behind C drive.

Unallocated space

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

Extend C drive

C drive space is increased to 50GB by getting 20GB free space from D.

C drive increased

Step 3: Click Apply on top left to execute, done. If you did something wrong, simply click Undo to cancel the pending operation.

If the adjacent drive D has not enough free space, you can get from other volumes in the same disk, watch the video:

In Summary

To increase C drive space in Windows 10, the native Disk Management only works in special condition, so you need third party professional partition software in most cases. As the safest partition tool, NIUBI Partition Editor can decrease and increase partition size without losing data. You just need to drag and drop on the program.

Download to try

How to increase c drive space in Windows 10?
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