I have a lot of photos on google and wanted to start moving away. I created a (fixed) VHD under Windows and spent slices of time over several months downloading and organizing these images. I ran out of room on the VHD.

Create a new (dynamic) 50% larger than before, attached both, started moving the files from A to B. When 2/3 of the files were moved I hit an out of room error!

Dir on my C:\VHD directory shows:

  • VHD A - 100GB
  • VHD B - 150GB

Mount and do properties:

  • VHD A - 25GB used (as expected)
  • VHD B - 75GB used (and reporting full)

For the life of me I cannot figure out what is going on!

Note: Numbers are not exact but within +/-5%...

  • How much actual drive space do you have left on wherever these are located? A fixed VHD should already occupy the entire allocated size, but a dynamic will grow as required.
    – Tetsujin
    Commented Feb 10, 2022 at 17:05
  • I currently have 201GB free on the drive where the VHDs live Commented Feb 10, 2022 at 17:30
  • Mount the VHD into windows and check disk management to see if the partition is actually spanning the entire vhd space. Chances are that it is not.
    – LPChip
    Commented Feb 10, 2022 at 17:35
  • I did - results are in the OP. When I look on the bare metal drive the suspect VHD reports using 150GB of drive space. When I mount it and select all the directories in that drive and do right-click, properties, it reports just over 75GB with 1GB free. Commented Feb 10, 2022 at 22:50


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