This Microsoft Teams tutorial will show you how to turn a file into a Microsoft Teams tab. If everyone in your channel needs quick access to a file, turn it into a tab so it's easy to get to. To do so, choose the file and select “more options" then "make this a tab. 

For more tips like this, check out the working remotely playlist at www.youtube.com/FoetronAcademy . Also, if you need any further assistance then you can raise a support ticket and get it addressed.