For this example, we will be replacing a non-ADA PDF with an updated ADA PDF for accessibility. 

This "Download page to print" button leads to a non-ADA PDF that we will be replacing. 

First we need the file name in order to replace. You can get this two ways. Clicking the button leads to Adobe Acrobat where you can see the name of the PDF at the top of the screen. 

The second way is to hover over the button and in the bottom left hand corner of the screen, Drupal will give you the path of that button. At the end of the path, you can see the name of the file. In this case, it's "conf_fact_sheet.pdf".

Click the tab "Files" by "Content" and begin typing the name of the file you want to replace. Click "Filter". 

In this case, it's "conf_fact_sheet.pdf" which shows up on the list. 

It will list how many times it's used on the website. To replace, click "Edit". 

Now the new file is in place. It will rename itself as the old file name, so there is no confusion if a user has an old link to the old file. It will automatically direct them to the new file because it has the same naming convention. If you are working with PDF accessibility and the case is the files look the exact same and you want to test that the file did get replaced, you can re-download this file and run it through the accessibility checker in Acrobat to check that this new file does pass accessibility. 

Rutgers

inn.rutgers.edu

The Files Replace feature allows you to replace every instance of an image without having to replace each instance of the image manually. It also automatically replaces the images without having to manually delete old files from IMCE files browser.

How to Replace Images Using Files Replace Feature