100GB+ of hidden space I can't delete or purge
Try OmniDiskSweeper which shows in a column-view:



Largest folders will sort to the top.

I often will run it via

sudo /Applications/OmniDiskSweeper.app/Contents/MacOS/OmniDiskSweeper 2&gt;/dev/null 


Also: make sure that it gets “Full Disk Access” as shown here: