Files app is also integrated with other cloud services like Dropbox, Box etc. Hence, you can access and manage all of your files synced with supported file storage and synchronization services right from the app.
Access iCloud Drive Files on iPhone
Step #1. Launch Files app on your iOS device → Now, tap on Browse tab at the bottom. Step #2. Under Locations, tap on iCloud Drive. Now, check out all of your files saved in iCloud. Further, if you haven’t yet got started with the Files app or wish to use it perfectly, jump over to this post. Wrapping up: Files app is a welcome addition to the iOS 11. Though it may not be as feature-rich as some of the most popular third-party file managers like Documents, it’s still very handy. Let me know what you think of it in the comments below. You might want to glance through these posts as well:
How to Customize Tags in Files AppHow to Recover Deleted Documents in Files AppBest File Manager Apps for iPhone and iPadHow to Scan Documents in Notes App