Can't shrink partition Win10

Windows 10 can’t shrink volume partition – solution

This page explains why cannot shrink volume in Windows 10 Disk Management and the solution if Shrink Volume is disabled or Windows 10 can’t shrink partition beyond the limit.

Can't shrink partition Win10

Why cannot shrink partition in Windows 10

If you fresh installing Windows 10 to a new hard disk but forget to create partitions, you’ll get single C: drive and the system reserved partition. As we know, it is not good to throw everything into C drive, so you’d better shrink C drive to create more partitions. Microsoft provides Shrink Volume in native Disk Management console, with which you can shrink a volume on the fly without reinstalling OS.

However, many people feedback that they cannot shrink disk partition with Shrink Volume function. The most possible reason is conflicting available free space.

When shrinking a partition with Shrink Volume, Disk Management will calculate the disk space to shrink and the default amount is maximum available space.

Enter amount

As we know, many types of files are writing into C drive continuously, so the available space is less than 150264MB. That means, you can’t shrink this partition with default maximum space. If you do this, you’ll receive the error message “There is not enough space available on the disk(s) to complete this operation.”

Error message

In this situation, shrink partition with less amount of space.

Can’t shrink partition beyond the limit

In my another Windows 10 laptop, there is 7.53GB free space in C: drive, but the available space to shrink is zero. Why?

As the tip explains, you cannot shrink a volume beyond the point where any unmovable files are located.

For example, C drive is made up of 4 blocks. If the unmovable files are located in block 3, you cannot shrink this partition to block 2 or 1, although there is free space there.

Shrink C drive

This is the reason why many people feedback that they can’t shrink partition or can only shrink little space.

Shrink volume limit

Can’t shrink volume to extend other drive

If you want to extend a partition in Windows 10 Disk Management by shrinking another one, it is impossible no matter you shrink D to expand C or shrink C to extend drive D.

Remember the rule: Extend Volume only works when there is adjacent Unallocated space on the right side of the drive that you want to expand.

After shrinking C drive, Unallocated space is on left side of D, so Extend Volume is disabled to drive D. After shrinking D, Unallocated space is the right side of D, so Extend Volume is disabled for C drive. If you want to do these operations, you need professional partition editor software.

Extend Volume greyed out

Shrink Volume is disabled in Disk Management

Another common reason why cannot shrink partition in Windows 10 Disk Management is because of non-supported partition type. Actually, both Shrink and Extend Volume support NTFS partition only, so you can’t shrink the partitions formatted as FAT32 or other types.

Extend Volume disabled

Solution of can’t shrink volume on Windows 10

It seems complicated, but it is very easy to solve this problem. With NIUBI Partition Editor, you just need to drag and drop on the disk map to shrink and extend partitions. Comparing with native Disk Management, NIUBI Partition Editor has much more options:

  • Shrink a drive and produce Unallocated space on either side.
  • Shrink a drive to minimum size, because it can move the “unmovable” files.
  • Extend partition with Unallocated space on either side.
  • Move Unallocated space to the other side.
  • Both FAT16/32 and NTFS partition can be shrank and extended.

When you can’t shrink volume partition in Windows 10 Disk Management, Download NIUBI Partition Editor and follow the steps in the video: