App or Service to Automatically Backup Photos in iCloud Photo Library? This is my situation:


MacBook and iPhone both using Photos.app and both using iCloud Photo Library
Neither device has enough local storage to keep the originals, so they're both set to the Optimize Storage option
I'd like an automated backup solution for the photo collection in iCloud Photo Library...


I've read How do I backup photos *from* iCloud Photo Library - along with other Q&amp;As and pages, so I'm aware I could do things like:


Change the location of the library on the Mac, to an external drive, and switch the setting to *Download Originals...
Use iCloud.com to download photos, on any machine with a big hard disk or the current Mac, to an external drive...


What I'd prefer is an automated backup process. I know that iCloud Photo Library is fairly new; does anyone know of a Mac app, or an online service, that uses a user's iCloud credentials to take regular backups?
Turn on automatic backups.
Whenever plugged in, locked, and connected to wifi, the device will backup.  

Call Apple if you are not sure how to turn on backups.