Storing one file in multiple folders

Hi Vi, 

Welcome to the Box Community!

You can Bookmark a file to achieve this and copy that bookmark in multiple folders in your Box.

The user/s using the bookmark would have to have access to the actual folder (where the bookmark points to) as well. 

More information can be found in this article on how to create and use Bookmarks in Box: https://support.box.com/hc/en-us/articles/360043695534-Creating-Bookmarks 

Is there a way to share a single file into multiple Box folders? 

Currently I use Bookmarks but they do not help if the access level is different for different folders.