Adding files to Favorites is a great way to prioritize content and can help you find what you need right away. Microsoft is improving the Favorites experience by making it consistent across Microsoft 365 apps and allowing users to favorite files from other locations.
Users will be able to favorite files from OneDrive Web and Document Libraries and easily access them from the Favorites pivot in the left navigation pane.
Users can favorite and unfavorite files by hovering over the file and selecting the start icon, or by using the Favorite/Unfavorite command in the context menu and command bar.