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Windows allows you to resize a volume by using the Shrink Volume or Extend Volume options within the provided disk tools. You can shrink existing volumes to allow space to create additional, unallocated space to use for data or apps on a new volume. On the new volume, you can:
To perform a shrink operation, ensure that the disk is formatted with the NTFS file system or, if it is unformatted, ensure that you are part of the Backup operator or Administrators group. When you shrink a volume, contiguous free space relocates to the end of a volume. If you want to ensure that the maximum amount of space is available, make sure you perform the following tasks before shrinking:
When you shrink a volume, unmovable files (for example, a page file) do not relocate automatically. It is not possible to decrease the allocated space beyond the point where the unmovable files are located. If you need to shrink a partition further, transfer the unmovable file to another disk, shrink the volume, and then transfer the unmovable file back to the disk. You can shrink simple and spanned volumes, but not others. You can increase the size of a simple volume in the following ways:
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