Files
The Files app 
is a tool you can use to manage your cloud-based documents in iCloud and other cloud services like Google Drive and Dropbox.
To use Files with your files in iCloud, you must have iCloud Drive turned on in Settings 
> Apple ID > iCloud. To use Files with other cloud storage services, you must first install the apps on your device. To add them to Files:
- Open Files and tap the Browse tab (bottom right of screen).
- Tap
then Edit, then enable apps under Locations that you want to add. You can also add the Files widget to Today View or a Home Screen page.
