With assistance from eman and heysparky I used carbon copy clone//made a full clone and an apps clone. Both clones contain mostly 3 copies (sometimes 2) copies of the applications. The total size of the applications folder seems to be between 80-90GB. That's a lot. I'm thinking that this is way too big but maybe not. My first inclination was to go in and start pruning (deleting) duplicate entries (ie keep the first/delete the rest). But then I thought "if it works leave it alone." Araxis and Auslogics have duplicate file removal programs. What to do?