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How to shrink Disk partition (C:) further

Disk Partitions - not able to shrink enough 20 Reputation points
2025-12-10T19:26:11.23+00:00
  • "C drive will allow shrinking only for some extent as it contains the system files, so it used a huge space for it. so you were unable to shrink it, if you want to make changes in it you should perform a clean installation of the windows you set the partitions." summary of my problem by microsoft support person
  • i want to shrink my C partition about 100GB and i have enough free space for it but it lets me shrink only by 25GB
  • i cant do a clean install for i have another partition with stuff i cant spare and dont have another disk to put it on or a USB thats big enough

Moved from: Developer technologies | Universal Windows Platform (UWP)

Windows for home | Other | Files, folders, and storage
Answer accepted by question author
  1. Rodrigo Queiroz 71,085 Reputation points Independent Advisor
    2025-12-10T20:22:05.72+00:00

    Hi, I'm Rodrigo and I will help you.
    The Disk Management only allow you to shrink the partition to a point where there is no unmovable system files.

    You can try using a third-party tool to shrink and create new partitions, these tools have more options for that, and can do it on the free version.

    This is an example of a third-party tool, https://www.aomeitech.com/pa/, on the page, select "Download Freeware"to download the free version.

    Standard Disclaimer: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.

    After downloading and installing it, open it, right-click the partition you want to shrink > Resize/Move partition > Drag from the right edge to reduce its size > OK.
    On the tool, you can create new partitions if you want. Select "Apply" in the top right corner to apply the changes, it may require restart to apply.

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