When you set up iCloud, you get 5 GB of free storage. You get more storage when you upgrade to iCloud+. You can choose an iCloud+ plan with 50 GB, 200 GB, 2 TB, 6 TB or 12 TB of storage. For more information, see Buy more iCloud storage with iCloud+ and the Apple Support article iCloud+ plans and pricing.
You can protect your account with two-factor authentication, and many iCloud features require it. When you use two-factor authentication, you need to enter both your Apple Account password and a six-digit verification code to access your data. As extra protection for your Apple Account against phishing attacks, you can also use a physical security key instead of a verification code. See the Apple Support articles Two-factor authentication for Apple Account and About security keys for Apple Account.
All information stored in iCloud is encrypted, and certain iCloud features use end-to-end encryption. This means that only you can access your information, and only on devices where you are signed in to iCloud.
Here are some examples of what you can store in iCloud.
Photos and videos: you can use iCloud Photos to store your photo library in iCloud and see it everywhere. Your original, full-resolution photos and videos are stored in the cloud. Smaller versions of your photos and videos appear on your devices, but you can download the original versions at any time. See Share photos and videos and keep them up to date with iCloud.
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