macos: How would I find the top fastest growing files and directory
Easy and free is the How to free up storage space on your Mac guide

https://support.apple.com/en-us/HT206996

Make a screen shot of the two top images once a day for three days running or once a week, you can see growth and then know where to focus your cleanup efforts. DaisyDisk is nice, too but start for free is my advice.


If you like command line tools, ncdu is the ticket and https://brew.sh is a popular option to get it and other similar tools installed and patched over time.