Please, don't mark this post as a duplicate! I already checked all the same posts about this topic on this website and can say that all answers really answer nothing. I have 256gb SSD, and 85 (!!!) of them are in the Other storage. It is ridiculous. Those files don't exist. I already used OmniDiskSweeper - it does not show those files. It shows only 135gb and that's all, yep. 20gb for MaOS and other 85 are just gone forever. Don't suggest me using CleanMyMac please, I used it, it cleaned 1 Gb of junk files, clearly not 85... It seems that there is no point of buying 256 and for the next Mac I'll have to buy 512
Other == Miscellaneous.
It isn't a single category, it's everything left after the categorisable data has been accounted for. You will not find it all in one convenient pile in a corner of your drive, waiting patiently for you to consign it to the Trash.
I would still consider the answers to How can I figure out what's slowly eating my HD space? would be your best method to tackle this dilemma.