How to Back Up Your iPhone to iCloud

What happens when you back up your iPhone to iCloud

When you turn on iCloud backup, your iPhone sends a copy of your photos, messages, contacts, calendar events, app data, and device settings to Apple's servers. This happens automatically once a day when your phone is plugged in, locked, and connected to Wi-Fi. If your phone is lost, stolen, or stops working, you can restore all of that information to a new iPhone by signing in with your Apple ID.

iCloud backup does not back up everything on your phone. It skips apps themselves (you can re-read those from the App Store), music and movies you bought elsewhere, and files stored in iCloud Drive or other cloud services. It also does not back up data from apps that store information only on your device and do not sync to iCloud — though many apps now do sync automatically.

The backup file stays on Apple's servers until you delete it or until 180 days pass with no activity on your account. If you stop paying for extra iCloud storage and your backup exceeds your free allowance, Apple stops making new backups but does not delete the old one when ready.

Key Takeaways

iCloud backup turns on in Settings > [Your Name] > iCloud > Backup, and then you toggle iCloud Backup to on.
Your phone must be plugged in, locked, and on Wi-Fi for a backup to happen automatically, which usually takes a few minutes to an hour depending on how much data you have.
You get 5 GB of iCloud storage free, which covers most people's backups unless you have thousands of photos or large app data.
If you run out of storage space, iCloud stops backing up but does not delete your existing backup, so you can buy more storage or delete old backups to make room.
You can see exactly what is backed up and delete individual backups from Settings > [Your Name] > iCloud > Manage Storage > Backups.

How to turn on iCloud backup for the first time

Open Settings on your iPhone and tap your name at the top of the screen. Tap iCloud, then scroll down and tap Backup. Toggle the switch next to iCloud Backup to the on position (it will turn green). Your phone will ask you to confirm — tap Turn On.

Your first backup will start the next time your phone is plugged in, locked, and connected to Wi-Fi. You do not have to do anything else. If you want to back up right now instead of waiting, you can tap Back Up Now on the same screen, but your phone still needs to be plugged in and on Wi-Fi.

If you see a message that says "iCloud Storage Full," your backup cannot proceed until you either buy more storage or delete old backups. See the section below on what to do when you run out of space.

What to do if your iCloud storage is full

iCloud gives you 5 GB free. If you have a lot of photos, videos, or large app data, you may hit that limit. When you do, iCloud stops making new backups, but it does not delete your existing backup automatically.

You have three options. First, you can buy more storage: 50 GB costs $0.99 per month, 200 GB costs $2.99 per month, and 2 TB costs $9.99 per month. The purchase is tied to your Apple ID and covers all devices signed in with that ID. Second, you can delete old backups to free up space. Go to Settings > [Your Name] > iCloud > Manage Storage > Backups, tap the backup you want to remove, and tap Delete Backup. Third, you can reduce what gets backed up by turning off backup for specific apps — on the same Manage Storage screen, tap the backup, then toggle off any app you do not need to restore.

If you delete a backup, you cannot restore from it later. Only delete a backup if you have a newer one or if you do not need the data from that date anymore.

How to restore from an iCloud backup

If you get a new iPhone or reset your current one, the setup screen will ask if you want to restore from an iCloud backup. Sign in with your Apple ID, choose which backup you want to restore from (usually the most recent one), and tap Restore. Your phone will read all your data and settings from that backup.

Restoring takes anywhere from a few minutes to an hour depending on how much data you have and how fast your Wi-Fi is. Your phone will restart several times during the process. Do not unplug it or turn it off.

If you are restoring to a phone that already has data on it, restoring from iCloud will overwrite that data with what is in the backup. Make sure you have backed up anything on the current phone that you want to keep before you start the restore.

How to check what is in your backup

Go to Settings > [Your Name] > iCloud > Manage Storage > Backups. You will see a list of backups, each labeled with the device name and the date it was made. Tap any backup to see a breakdown of what is included: photos and videos, mail, contacts, calendars, app data, and so on.

The backup size tells you how much iCloud storage that backup is using. If you have multiple backups and want to keep only the newest one, you can delete older backups here. Tap Edit in the top right, then tap the red minus sign next to the backup you want to remove, and tap Delete.

When iCloud backup does not work the way you expect

If your backup has not happened in a while, check that your phone is plugged in, locked, and connected to Wi-Fi. iCloud only backs up when all three conditions are met. If you are on a public Wi-Fi network that requires you to sign in through a web page, iCloud may not be able to connect — try moving to a network that does not require that step.

If you see an error message during backup, write down the exact message and check Apple's support page for that error code. Common issues include a network interruption (just wait and try again), iCloud storage being full (see the section above), or a problem with your Apple ID (try signing out of iCloud and signing back in).

If you are trying to restore from a backup and it keeps failing, make sure you are using the correct Apple ID — you can only restore a backup made with one Apple ID to a phone signed in with the same ID. If you are trying to restore to a much older iPhone model, some app data may not be compatible and will be skipped.

How iCloud backup compares to other backup methods

iCloud backup is automatic and requires no action from you after you turn it on. It works over the internet, so you do not need a computer. The downside is that you are trusting Apple with your data, and you have limited control over exactly what gets backed up.

The other main option is to plug your iPhone into a Mac or Windows computer and use Finder (on Mac) or iTunes (on Windows) to create a local backup. A local backup is faster, gives you more control over what gets backed up, and keeps your data on a device you physically own. The downside is that you have to remember to do it, and you need a computer.

Many people use both: iCloud backup as the automatic safety net, and a local backup once a month or before a major iOS update. That way, if iCloud fails or Apple's servers have a problem, you still have a copy of your data.

Frequently Asked Questions

Does iCloud backup back up my photos?

Yes, iCloud backup includes all photos and videos in your Photos app. However, if you use iCloud Photos (a separate feature that syncs your entire photo library to iCloud), those photos are already in the cloud and do not need to be backed up again. You can turn on both iCloud backup and iCloud Photos at the same time without creating duplicates.

Can I back up my iPhone without Wi-Fi?

iCloud backup requires Wi-Fi. If you need to back up over cellular data, you can use a local backup to a computer instead, or you can turn on iCloud backup and wait until you are near Wi-Fi. Some people turn on Wi-Fi at home or at work and let the backup happen automatically overnight.

What happens to my iCloud backup if I cancel my subscription?

If you stop paying for extra iCloud storage and your backup is larger than 5 GB, iCloud stops making new backups. Your existing backup stays on Apple's servers for 180 days. If you buy storage again within that time, backups resume. After 180 days of no activity, Apple deletes the backup.

Can someone else restore my iPhone using my iCloud backup?

No. To restore from an iCloud backup, you need to sign in with the Apple ID that created the backup. If someone has your Apple ID password, they could restore your backup to another phone, which is why keeping your password find matters. You can see which devices are signed in with your Apple ID in Settings > [Your Name] > Devices.

Does iCloud backup encrypt my data?

iCloud backup is encrypted in transit (while it travels to Apple's servers) and at rest (while it sits on Apple's servers). However, Apple holds the encryption keys, which means Apple can read your backup data if a government agency asks them to. If you want encryption that only you can unlock, a local backup to your computer is more private, because you control the encryption password.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.