freeing up space on macbook air 2015

Any suggestions on how do I clean up "Other" - I've done all the steps in the Free up storage space on your Mac - Apple Support

Is this outlook mail ? Is this 5-6 years of Archived OSX Updates? Is this because I don't backup to the icloud (against our company policy).

Thank You, Jeff

Follow these instructions to free up storage space: Free up storage space on your Mac - Apple Support

Please note that you have no control over the "other" category (now named system data) as explained here:

See used and available storage space on your Mac - Apple Support

You should start your own posting.