Listing of Folder and Files structure on a Mac

I use BBEdit, formerly Text Wrangler, just open a blank window & drag a drive to that window & wait a bit...

https://www.barebones.com/products/bbedit/

The ~ means “home directory”

/Volumes is not in your home, so you don’t need the ~ in front of /Volumes

The best tool for what you want is a free, third-party package named tree which you would install via a package manager (e.g. homebrew). It would also require that you have either Xcode, or the Xcode command-line compiler tools in order for the package manager to build tree from its source code. Alot of work to get a tree diagram if you don't already have the required tools in place.

I have some AppleScript code that generates a file and folder hierarchy diagram for local folder structure, and USB mounted drives. It will prompt you for the location, and generate a PDF of the structure.

Because the code is too large (102 lines), the hosting software will not permit my posting it here. I will need to provide it via my Google Drive shared folder location in a follow-up post.

Here is a sample, partial output:

Here is the Google Drive Shared folder for the downloadable, zipped AppleScript to generate the tree diagram.