Help!

I'm afraid your post doesn't make sense (to me at least) and its not clear why you are talking about folders & sub folders, Word and then .pst files. Word is a tool for creating text based documents. You then save those files to a folder, usually as .docx files. You would use File Explorer to see these files. .pst files are used by Outlook and used by your PC to store those emails. The .pst file is just a container with emails in it. You wont see any emails if you try to do anything with a .pst file, you would need to use Outlook and import the .pst file.

Try explaining in a different way what you have been asked to do. Someone may then be able to help you. Right now, placing files (presumably Word documents) in a folder and then trying to put them in to a .pst doesn't make sense.

Happy to assist if I can my head around what you're trying to do.