Win10 Reserved Storage

Discussion in 'other software & services' started by Brian K, Nov 27, 2019.

  1. Brian K

    Brian K Imaging Specialist

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    A fresh install of Win10 1903 and 1909 contains 7 GB of "Reserved Storage". This 7 GB is included in the Used space number of Disk Management. However, these boot disks, BootIt, GParted, Linux, Macrium, AOMEI and ACTIVE@ Disk Image do not see the 7 GB included in the Used space. They see 7 GB more Free space than Win10 sees.

    So these apps will let you resize the Windows partition to have less than 7 GB of Free Space. If you do this, Win10 will no longer boot and it can't be fixed. Resizing back to the original size doesn't help.

    I'm advised it's a Win10 bug.
     
  2. Hadron

    Hadron Registered Member

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    Hi Brian.

    I installed another backup hard drive in one of my computers the other day, and initialised and formatted it with Disk Management.
    Then maybe a couple of days later, I noticed that it somehow had an extra 3GB hidden partition there.
    I thought, "Why is Windows 10 adding that there"? I only noticed it after I had added a lot of data to it.

    I removed it with MiniTool Partition Wizard.
    To this day, I don't know how it got there. *puppy*
     
  3. Brian K

    Brian K Imaging Specialist

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    Hadron,

    When you setup that drive, did you create a single partition with no free space left over?
    Was there any data in the 3 GB partition?
     
  4. Hadron

    Hadron Registered Member

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    Brian, I just went through the standard procedure. When Disk Management noticed a new drive, it offered to initialise it and format.
    I wanted a single partition drive. I used the maximum available, so I don't know what happened.
    I would have done it hundreds of times over the years. I have never seen that occur before.
     
  5. Brummelchen

    Brummelchen Registered Member

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  6. Brian K

    Brian K Imaging Specialist

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  7. Brummelchen

    Brummelchen Registered Member

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    i dont care about such tweaks, maybe usefull for embedded win10 on sd-cards with 32gb.
    my win10 x86 here has 12gig (of 100gig space after moving, 50gig before moving to new hdd), win8 <20, win10 pro x64 <30 (all on 50gig/now 100gig partitions)
     
  8. Brian K

    Brian K Imaging Specialist

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    As a test I have Win10 Pro (64-bit) running in a 5.85 GB partition. There is only 116 MB of Free Space in the partition. I just wanted to see how low I could go. Totally impractical of course.
     
  9. Brummelchen

    Brummelchen Registered Member

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    ofc that makes sense then ^^
     
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