Parachute Backup - Backup Utility for iCloud Drive and iCloud Photos
parachuteapps.com/parachute
What Jamie wrote
I like that we are getting more "backup your cloud stuff" tools. It is all fine for us to have cloud capabilities but I don't like the fact that I don't have my own copy. Having a dozen terabytes of local storage with software constantly mirroring your cloud activity locally is the right answer.