Virtual Drive stays after disabling Sandbox

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  1. Posts : 531
    Windows 10 Pro x64 Version 21H2
       #1

    Virtual Drive stays after disabling Sandbox


    Hello,

    I noticed an virtual drive in Disk Management called "PortableBaseLayer" that appeared ever since I have enabled Windows Sandbox. It takes up 8 GB.

    However, this virtual drive does not go away after disabling Sandbox and still takes up 8 GB. I am using Windows 1909.

    Anyone else experiencing this? How do I solve this?
      My Computer


  2. Posts : 34,902
    Win 10 Pro (1903) (2nd PC is 21H2)
       #2

    The tutorial
    Enable or Disable Windows Sandbox in Windows 10
    says:
    When Windows Sandbox is enabled a read-only 8 GB PortableBaseLayer system partition without a drive letter is automatically created and should not be deleted. The PortableBaseLayer partition is automatically removed when Windows Sandbox is disabled.
    - which is clearly not happening... and you're not the only one to have experienced this.

    This may give some clues-- not straightforward.
    Is it safe to delete baselayer and sandbox from Containers Folder
      My Computers


  3. Posts : 531
    Windows 10 Pro x64 Version 21H2
    Thread Starter
       #3

    dalchina said:
    The tutorial
    Enable or Disable Windows Sandbox in Windows 10
    says:

    - which is clearly not happening... and you're not the only one to have experienced this.

    This may give some clues-- not straightforward.
    Is it safe to delete baselayer and sandbox from Containers Folder
    I have indeed read that thread. But I'm not sure if deleting the container files themselves would be safe enough.

    I am surprised there is no option at all to reclaim the 8GB after Sandbox has been disabled.

    I did notice I can detach the virtual drive in Disk managment. Is this safe enough and will I be able to delete the volume after?
      My Computer


  4. Posts : 24,550
    10 Home x64 (21H2) (10 Pro on 2nd pc)
       #4

    JohnnyGui said:
    I have indeed read that thread. But I'm not sure if deleting the container files themselves would be safe enough.....
    It's not. I broke my system by doing that on its own, as I said in that thread. I also posted a link in that thread to details of the Registry keys that also need deleting.

    What is this large folder? - post #43
      My Computers


  5. Posts : 531
    Windows 10 Pro x64 Version 21H2
    Thread Starter
       #5

    Bree said:
    It's not. I broke my system by doing that on its own, as I said in that thread. I also posted a link in that thread to details of the Registry keys that also need deleting.

    What is this large folder? - post #43
    Is there a chance the PortableBaseLayer is not solely connected to Sandbox but appears as a bug the moment Sandbox gets enabled?
      My Computer


  6. Posts : 34,902
    Win 10 Pro (1903) (2nd PC is 21H2)
       #6

    Hmm..
    https://answers.microsoft.com/en-us/...3-9a3c913396a6
    I would like to confirm if you would really want to remove this gracefully? .. if you wish to proceed, then let's do an in-place upgrade as that's the only known solution (at this stage) to gracefully remove the PortableBaseLayer Partition.
    (March 2020)
      My Computers


  7. Posts : 531
    Windows 10 Pro x64 Version 21H2
    Thread Starter
       #7

    dalchina said:
    Remarkable that even after > 1year this hasn't been fixed properly.
      My Computer


  8. Posts : 34,902
    Win 10 Pro (1903) (2nd PC is 21H2)
       #8

    Just a random thought- try a clean boot, then enable Sandbox, disable it and restart.
      My Computers


  9. Posts : 13,563
    Windows10
       #9

    JohnnyGui said:
    Is there a chance the PortableBaseLayer is not solely connected to Sandbox but appears as a bug the moment Sandbox gets enabled?
    This is probably correct. I believe the portable baselayer is also related to the reserved space for updates which was introduced a year or two back. I concluded it was not really sandbox related but something in sandbox makes this reserved space more visible.
      My Computer


  10. Posts : 531
    Windows 10 Pro x64 Version 21H2
    Thread Starter
       #10

    cereberus said:
    This is probably correct. I believe the portable baselayer is also related to the reserved space for updates which was introduced a year or two back. I concluded it was not really sandbox related but something in sandbox makes this reserved space more visible.
    Ah, so the reserved space by portable baselayer is already taken even before enabling Sandbox I assume?
      My Computer


 

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