Amazon Photos is an official Amazon app that helps you make backup copies of all the photos on your Android. The app offers five gigabytes of free storage that can, of course, be increased with annual subscription plans (though Amazon Prime members have unlimited storage by default).
Once you install Amazon Photos and set it up (it comes with a default configuration), the app will sync all the photos you take. It stores them in your Amazon cloud account, so you can access them via any device or computer with an Internet connection.
Some of the options include the ability to sync photos only when you have WiFi, or automatically organize them into different albums.
Amazon Photos is an excellent alternative to Google Drive and other photo-syncing apps. It has a large storage capacity and some great features.