For those who aren’t used to using a command line to generate listing, here is a useful tool for capturing a folder structure on a drive. Snap2HTML lets you create a folder listing as an HTML file. You can also save it as a plain txt, CSV or JSON file. Nice little tool. Here’s the link.
Another option, if you’re on a *nix system (UNIX, BSD, macOS, linux) is tree:
tree -H . > out.html
can be run in a folder to generate the html for it and all sub-folders.
(Assuming you can be comfortable on the command line
).