Hi Lisa, 

Welcome to Box Community and glad to assist! 

Here's how you could create a File Request Link to obtain files from your colleagues. 

1. Select the folder that you want to contain the uploaded files


2. In the Sharing pane on the right, under File Request, click Create Link.
   
   • You can also click the ellipsis (…) to display the More Options menu, and then click File Request.
   
   

Hope it works!