10 Use iCloud, Dropbox or External Storage
Using cloud storage solutions — such as iCloud or Dropbox — will let you access files over the Internet instead of storing them directly on your device. Apple’s Files app is an excellent solution, as iCloud is built right in, and you can add other cloud storage services so you can access all of your documents and media in one place.
If you’d prefer to keep your data out of the cloud and on a physical device, there are many external storage options that will work with your iPhone to back up photos, videos and documents.