One of the reasons why people invest in the Apple ecosystem is the interoperability between devices. The main reason for the interoperability is iCloud, Apple’s cloud service. You can get a free membership when you create an Apple Account, which includes a paltry 5GB of cloud storage. We recommend upgrading to at least 50GB if you can afford it, which costs $0.99/£0.99 per month.
If you sign up for more storage, you are also getting Apple’s iCloud+ service. With iCloud (sans the “+”), you get syncing between your iPhone, iPad, and Mac, and 5GB of storage. The “+” in “iCloud+” means that the service offers more features, but because iCloud has been a storage service for so long, these additional features are often overlooked.
Read more at Macworld.com