iCloud is Apple's new, free don't-call-it-sync service that stores your stuff up on Apple's gigantic servers and pushes it down to all your devices. And it works great... but it can be a challenge if you have a family. Now apple has never been great about handling the whole family thing to begin with. Their digital hub has always been fantastic for a single person but started to break down when you wanted to manage a family, especially with multiple accounts. iCloud is no exception.