How to create a file uploader for the Organization's Profile creation form?

Hello UNA team,

I would like to offer an approval-based submission for organization profile creation. 

While creating their profile, I would like organizations to upload documents in .pdf, .docx or.jpeg for business verification (.eg. company constitution or articles of association, partnership agreement, certificate of incorporation, certificate of nonprofit registration etc). Upon review, we will approve or reject their Profile creation.

The moderation of our Organization module is already set to: 'Activate manually after creation and editing'.

So, how to create a file uploader on the create organization's profile form? And how will the admin view or receive the uploaded files? Where will those be saved? Will the user still be able to view or have access to the files they uploaded?

Thanks