Thanks
Thank you for all of your replies. They've been very helpful.
It was my son's WOW that I was trying to delete. It was using more than 23 GB!
I found the best way was to do a Finder search and adjust the criteria to include file names and clicked the "plus sign" and added system files. THEN i just dragged all that to the trash.
Thanks again! I Love this community ... been part of it for mare than decade. 😀