Hard Disk size doesn't add up, what to do?

Macbook Pro , Late 2012, 13"

I've added everything that I've installed and saved on my macbook and it doesn't match the info of my disk size...
I just deleted every document I have to see what would happen with the disk size and it says disk size for "other" is 85GB and

Audio = 0
Movie = 0
Photo = 0
Programmes = 0
Safety Copies = 0
Other = 85,17 GB

And the weird thing is I have 10 + adobe programs installed (that doesn't add up to anywhere near 85GB !)
But the weird'er thing is also that it says 0GB at programs/software as I obviously have a lot of programs/software installed. whaaat...

It's really annoying 😟

It seems as if the amount of data in "other" counts for is increasing

Is there anyone out there in the world of the internet who knows how to solve this?

I've tried to read a previous debate about this but to be honest I didn't get it...
I'm not exactly a macbook-computer-expert when it comes to knowledge like that

I'd be grateful for your help!