What's this 'other' occupying space?

looking @ available space on hard drive noticed called 'other' occupying 160bg on 256 ssd, have 70gb of data on drive.

it's not time machine ups ... mystery , can't find way delete or recover space.

 

discinventoryx, omnidiscsweeper, daisydisc names of free , useful tools understand occupying hd space.

 

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