There's a useful Apple-created tool built right into the OS:

1. Cmd-space for Spotlight

2. Type Storage Management

3. Hit Review Files

Now you can sort by largest files and quickly make an impact on space used.

The only problem I had with Apple's storage management utility is that it kept reporting a Steam game using 27G when that game was long deleted (and Steam itself was deleted). To resolve this, I had to go to the ~/Library/Application Support directory and completely remove the Steam folder (which didn't actually have that 27G game anywhere in it.)

My longstanding favorite for this has been OmniDiskSweeper[0]. It's dead simple and I've been using it for just about the entirety of OS X's existence.

[0]: https://www.omnigroup.com/more/

Gotta put a word in for daisy disk! Maybe you're paying for some fancy animations, but by golly are they nice LOL.

I second Daisy Disk. When I made the leap from Windows to mac in the early 00s I wanted something to replace the freeware “scanner” I had found so entirely useful.

http://www.steffengerlach.de/freeware/

What’s the advantage of Daisy Disk over the built-in “About this Mac -> Storage -> Manage”? Always interested in lovely boutique MacOS software, but in this case the website doesn’t sell it well as an alternative to what’s already available.

Some of the best functional data vis out there. For those wondering the chart type used by daisy disk is called a zoomable sunburst.

DaisyDisk is great. Best $10 on an app I've ever spent (circa 2015)

Put my vote in for `ncdu` (just skip your iCloud folders)

I agree, ncdu is a great and easy to use command line tool.

On Mac OS, run for example:

   ncdu -x --exclude /Volumes --exclude /System/Volumes /

This scans the root filesystem but excludes the Volume mounts specifically (the -x option to limit the scan to the current filesystem doesn't work properly on mac os). Navigate through the folders, sorted by size, from there. Press d to delete a folder.

Oh wow thank you

Disk Inventory X is great and that's how I found out the speech folder on my OS X was taking like 12GB.