Get List Of All Non-Markdown Files
Returns a list of all files (excluding Markdown notes) in a vault, as file paths, sorted alphabetically.
Most of the time you would use this action to get a list of all your file paths, then loop over the results list using the built-in "Repeat With" block and filter them with whatever you need. The loop variable
Repeat Item will contain a single file path.
If you want to filter the list, I recommend using the "Filter List" action from Sindre Sorhus's excellent Actions app (no relation) or a built-in "Repeat With" loop with a contained "If" action.