First, I made a share folder. Access to following link and make an access request to me. Just click "Request Access". To do so, only people whom I accepted can access to the folder.
https://goo.gl/GRFqwh
*The e-mail address is not mine.
I've already made some folders. I hope this will be some guideline. Please feel free to making new folders.
You can put any files to share folder.