Revamped File Manager
Another small but helpful change is the redesigned and revamped file manager. Also known as "downloads" on Nexus and Pixel devices. Some stock Android phones call this app "files".
It's still not as powerful as ES File Explorer or some of the popular options on the Google Play Store, but it's good enough that most won't need to download another app. You can now view, delete and move files easier, along with improved thumbnails for things like photos and video.