iCloud Photo Library stores all of your images and videos online but what if you also want additional backup?
The old saying, when it comes to backups, is one place is no place. With something as precious as your photo and video collection, you want to make sure you don't just have a backup to iCloud Photo Library, but a backup of the backup. "One local, one cloud" is the minimum. "Two local, two cloud" is the recommendation. Luckily, Photos for OS X lets you keep a copy of all your originals, all on your Mac. If you have at least one good-sized hard drive, that makes "one local, one cloud" easy. If you're already backing up that Mac as well, then it makes "two local, two cloud" take care of itself as well.