adingbatponder, Apple #MacOS with multiple #users. My 2Tb disk was getting #full for unknown reason.
#Finder does not show file sizes.
Tried using #MacPaw #cleanmymac to clean disk. No change.
Massive 'system data' shown in storage menu 'about my mac'.
Only #daisyDisk installed as free standing app NOT from (Apple Store!) using scan as administrator was able to find the 1) users with large video files 2) delete 'purgable space' presumably containing #timemachine junk.
Can anyone justify Apple #macOS design?