The 'used in' column in the file list within the Files Manager tells you if the file is being used in articles or not, but you cannot click it to see which ones (and open the articles). You need to click on the file first and it says 'Embeded in' (note the typo) with a dropdown that you need to click and from there you can access the articles. It would be easier if you could just click on the 'used in' pill to access this info in a popup or something, or hover over it.