Welcome to the Make community!
Looks like ShareFile’s app doesn’t have a “Search Folders” module, so our usual method of Search-Error-Create-Resume won’t work.
I’m sorry, but it looks like this ShareFile app is so underdeveloped and incomplete, it doesn’t even have a generic “Make an API call” module.
You can submit this suggestion to the Idea exchange, under App improvement ideas. Don’t forget to search for it first, just in case someone already suggested it!