Samsung now has its own cloud storage service that'll serve as a backup option for its devices. Simply called Samsung Cloud, the service offers 15 GB of free storage (at least for Galaxy Note 7 users) and you can use that space to keep a back-up of your phone's contents. Cloud can also be used to restore your data when you switch devices.
The service was announced during Samsung's Unpacked event and complete details aren't available. No paid tiers have been discussed, though Cloud is offering a fair amount of free space.