100GB+ of "Other" on Mac Mini

[MoodyM]

I have a late-2012 Mac Mini.

When I go to About This Mac > Storage, it tells me there's over 100GB of "Other":

However there are only 4 folders on the root of Macintosh HD:

Users (7.8GB)
Applications (2.9GB)
Library (3.7GB)
System (8GB)

There is nothing else on the Macintosh HD drive.

But that's only 22GB approx.

Any idea what's going on? Thank you.

 

[MoodyM]

A WhatSize scan doesn't reveal much either, even running it as Administrator:

 

[splifingate]

See: https://forums.macrumors.com/threads/invisible-photos-consuming-6gb-of-space.1933399/

 

[MoodyM]

Thanks, but the thing is, when I select the Macintosh HD icon on the desktop and Quick Look, it tells me I have 366GB of space left, from 500GB capacity. So OS X/Finder is also reporting 140GB of usage.

 

[splifingate]

I use Daisy Disk . . . in an Admin Account, it shows only /Users/Admin; when in a User Account, it shows only /Users/User.

For what all that's worth, it's just that not all things are seen, all the time.

I linked the above because of the Time Machine references (not active, here, so I can't see what may be where).

Difficult to imagine you misplacing ten handfuls of gigs in a nested series of hidden .folders/.files . . . :/