Increase Partition Size in Windows 7

Updated on: November 16, 2019

This article introduces how to increase partition size in Windows 7 32/64 bit, guide to increase size of partition C or D for Win7 computer without losing data.

The same with previous Windows XP and Vista, disk partitions in Windows 7 also run out of space, especially to system C drive and the partitions for backup, multimedia and projects. Better than Windows XP, Windows 7 native Disk Management has new feature to decrease and increase partition size without losing data. However, because of some inherent limitations, you still need professional partition software under many situations.

This article gives detailed steps to increase size of partition in Windows 7 with both native and 3rd-party software.

Increase partition size with Disk Management or diskpart

Windows 7 has 2 native tools - Disk Management and Diskpart. Disk Management has graphical interface and Diskpart works via command prompt. To increase volume size with either native tool, your disk partition must meet the requirements including:

  1. The partition that you want to expand must be formatted as NTFS or without any file system (RAW).
  2. There must be adjacent Unallocated space on the right of the partition that you want to extend.

If you want to increase C drive space by shrinking D or E, it is impossible with both native tools.

Extend Volume disabled

As the screen shot shows, Disk Management cannot extend drive C: or E: after shrinking D. This is because:

  • Shrink Volume function can only make Unallocated space on the right side while shrinking partition.
  • Extend Volume function can only combine Unallocated space to the contiguous partition on the left.

The only way to increase partition size with Windows 7 Disk Management or Diskpart is by deleting the right contiguous partition.

Better than the native tools, NIUBI Partition Editor can make Unallocated space on either side while shrinking, it is able to move and combine Unallocated space to other volume on the same disk.

Increase volume size by shrinking other one

By shrinking partition, part of unused space will be converted to Unallocated. Generally speaking, all files keep intact in original folder. However, there's potential data loss risk with unreliable partitioning software, especially when there's some hardware issue or software error while shrinking.

Better than other software, NIUBI Partition Editor provides powerful technologies to protect system and data:

How to shrink D to increase size of partition C in Windows 7:

Step 1: Download NIUBI Partition Editor and you'll see the main window with disk partition structure and other information.

NIUBI Partition Editor

Step 2: Right click the right contiguous partition D (or E: in some computers) and select "Resize/Move Volume", drag left border towards right in the pop-up window or enter an amount in Unallocated space before.

Shrink D

Then drive D is shrunk and Unallocated space is made on the left.

Partition D resized

Step 3: Right click drive C and select "Resize/Move Volume" again, drag right border towards right to combine this Unallocated space.

Extend C drive

Then C drive size is increased from 40GB to 60GB.

Partition C resized

Click Apply on top left to execute, done.

How to increase size of partition C: in Windows 7:

Video guide

How to increase size of partition D: in Windows 7:

Video guide

Increase drive size by merging another one

Another method is by merging partitions together, for example: if you combine drive E to D, free space and all files in drive E will be transferred into D drive. However, 1 of the partitions will be removed, if it is a problem, follow the steps above to shrink partition instead.

How to increase volume size in Windows 7 by merging other partitions:

Video guide

Increase size of partition by cloning to other disk

In some Windows 7 computers, system disk is small and there may be not enough free space. In that case, you can clone this disk to a larger one and increase partition size with additional disk space.

In Summary

To increase partition size on Windows 7, the built-in Disk Management or Diskpart tool only works by deleting the right contiguous partition, so you need 3rd-party professional partitioning software in most situations. Among these software, NIUBI Partition Editor is integrated with innovative 1 Second Rollback, Cancel-at-well and Virtual Mode technologies to protect system and data.