Extend C drive

How to extend C drive with Unallocated space in Windows 7?

Windows 7 enhanced the ability of disk partition management in its built-in Disk Management console. Comparing with Windows XP, Windows 7 Disk Management provides Shrink Volume and Extend Volume functionality to resize partition without data loss. However, both functionalities has many limitations, for example: Shrink Volume cannot shrink C drive beyond the position that unmovable files are located, Extend Volume cannot extend C drive with nonadjacent Unallocated space. In most cases, you still need third-party partitioning software.

When extend volume greyed out in Disk Management, move Unallocated partition with NIUBI Partition Editor and then the Unallocated space can be merged into C drive easily. In this article, I’ll show you detailed steps to extend C drive with Unallocated space in Windows 7.

Extend C drive with Unallocated

Delete volume to get Unallocated space?

To expand C drive with Extend Volume in Windows 7 Disk Management, the first thing is getting Unallocated space. As we know, the disk space will be changed to Unallocated after deleting a volume, but to extend C drive, do NOT get Unallocated space by deleting volumes, because:

  • If you delete the adjacent drive D, all programs and Windows services running from it stop working. In addition, if drive D is Logical partition, you cannot get Unallocated space by simply deleting it.
  • If you delete a nonadjacent volume, you cannot merge the Unallocated space into C drive.

Cannot extend C drive with Unallocated space

As I said in the beginning, Shrink Volume can be used to decrease partition size, free space of this volume will be changed to Unallocated after shrinking. However, after searching by Google you may find that many people feedback the same issue: they cannot extend C drive with Unallocated space, because Extend Volume is disabled when right clicking C drive.

In this situation, you need 3rd-party program to move the Unallocated space. To move partition in Windows 7, you may use free partition software such as NIUBI Partition Editor.

Move unallocated space

Move Unallocated partition

It is very easy to move Unallocated partition in Windows 7, DownloadNIUBI Partition Editor Free and follow the step below:

NIUBI Partition Editor

Right click drive D and select Resize/Move Volume, drag middle position rightwards in the pop-up window.

Move volume
Move unallocatedClick OK, 20GB Unallocated space moved behind C drive:

Unallocated partition moved

Click Apply on top left to execute. Now you can extend C drive with Windows 7 Disk Management or NIUBI Partition Editor Free.

Extend C drive with Unallocated space

It is also very easy to extend C drive with this free partition manager. Right click C drive and select Resize/Move Volume again:

Combine unallocated

In the pop-up window, drag the right border rightwards to hold the Unallocated space.

Merge unallocated to C

Drag to merge

Click OK, the 20GB Unallocated space added into C drive, remember to click Apply to execute.

Unallocated merged

In conclusion, Windows 7 Disk Management cannot extend C drive by shrinking D, but it is easy to move the Unallocated space with NIUBI Partition Editor. After moving the Unallocated partition to behind C drive, you can expand C drive under Disk Management or with this free partition software. Download To Try

How to extend c drive with Unallocated space in Windows 7?
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