I recommend using OmniDiskSweeper as root to see where the storage is
being used. To run it as root, open Terminal and run sudo
/Applications/OmniDiskSweeper.app/Contents/MacOS/OmniDiskSweeper
Take a look at the solution in this
post.https://www.jamf.com/jamf-nation/discussions/21384/hostile-takeover-possible-to-purge-non-removable-mdm-profile
