Helped me to free up a lot of disk space
I used to use Whatsize and discovered it did not survive the migration to m newest Mac last year. Nor could I find my old license info nor did I want to spend the price they now charge (seems like it was a lot less back in the day). So after some research I decided to try Disk Space free and I liked what I saw. So I upgraded to pro which I think is reasonabley proced for what it does. The app is easy to use and helped my find what was unnecessarily taking up a lot space. I actually had two extra iTunes media folders that made for backup a few years ago and forgotten about. Deleting them and some other uneeded things immediately freed up almost 400 GB on my system’s internal and external drives. Your milage will vary.
Jimtowner about Disk Space Pro