How do I create a file link in a page in a group?
In groups, you can add a file to a page.
Open Files Folder
Select Link Location
In the Rich Content Editor, place your cursor where you wish to insert your file.
Insert File Link
In the Content Selector, click the name of the file  you want to insert into the Rich Content Editor. The name of the file will appear in the Rich Content Editor  and flash yellow. Then the name will turn blue, indicating it is a link.