With Robin by Nextbit, you don’t need to worry about running out of storage. The onboard storage is merged with 100 GB in the cloud, so you always have the space you need for the things you want.

Smart storage seamlessly backs up your apps and photos, intelligently archives the stuff you’re not using to make room for new stuff, and easily restores items when you want them.

Note: Available only for the Robin by Nextbit.
Don’t have a Robin? Get one now!
From version Nextbit smart storage 2.2.0 (B298) (426975d):
Alpha build. Nougat.
All versions