What iCloud backup does and how to turn it on

iCloud backup saves your iPhone's photos, messages, contacts, settings, and app data to Apple's servers. When you set up a new iPhone or restore an old one, you can pull everything back from that backup instead of starting from scratch. The backup happens automatically over Wi-Fi if you turn it on — you do not have to remember to do it manually each time.

To turn on iCloud backup, open Settings on your iPhone, tap your name at the top, then tap iCloud. Scroll down and tap iCloud Backup. Toggle the switch to on (it will turn blue). Your iPhone will start backing up the next time it is plugged in, locked, and connected to Wi-Fi. The first backup can take an hour or more depending on how much data you have.

iCloud gives you 5 GB of free storage. If your backup is larger than that, you will need to buy more storage through Apple — 50 GB, 200 GB, or 2 TB plans are available. You can check how much space your backup uses by going to Settings, your name, iCloud, and tapping Manage Storage.

Key Takeaways

  • iCloud backup saves automatically when your iPhone is plugged in, locked, and on Wi-Fi, so you do not have to do anything after turning it on.
  • The first backup takes time — often an hour or more — so plug in your phone when you have time to let it finish.
  • You get 5 GB free; larger backups require a paid iCloud+ plan, which also gives you email and other services.
  • To restore from backup, sign into iCloud during iPhone setup and choose to restore from your most recent backup.
  • Photos stored in iCloud Photo Library are backed up separately and do not count toward your backup storage limit if you pay for iCloud+.

Checking your backup is actually happening

After you turn on iCloud backup, your iPhone should back up within a few hours if the conditions are right: the phone must be plugged in, locked (screen off), and connected to Wi-Fi. If you leave your phone unplugged or keep using it, the backup will not start.

To see when your last backup happened, go to Settings, your name, iCloud, and tap Manage Storage. At the top you will see your device name and the date and time of the most recent backup. If that date is old — older than a few days — your phone has not backed up yet. This usually means it has not been plugged in and locked on Wi-Fi long enough.

If you want to force a backup right now instead of waiting, plug in your phone, lock it, make sure it is on Wi-Fi, then go to Settings, your name, iCloud, and tap iCloud Backup. Tap Back Up Now. The backup will start when ready. Do not unplug the phone or unlock it until it finishes — you will see a progress bar.

What gets backed up and what does not

iCloud backup includes your messages, contacts, calendar events, reminders, notes, health data, home screen layout, app data, and device settings. It also includes photos and videos in your Camera Roll, but only if you are not using iCloud Photo Library (a separate feature that stores photos in the cloud instead).

Some things do not get backed up. Apps themselves are not backed up — instead, your iPhone re-downloads them from the App Store when you restore. Music and movies you bought from iTunes are stored in your account, not in the backup. Photos in iCloud Photo Library are stored separately. Anything stored only in an app that does not sync to iCloud (like some banking apps or games) will not be in your backup.

If you use iCloud Photo Library, your photos are stored in iCloud but backed up separately from your main backup. This means your photos stay safe even if something goes wrong with your device backup. You can turn on iCloud Photo Library in Settings, your name, iCloud, Photos.

Understanding iCloud storage and paid plans

Every Apple account gets 5 GB of free iCloud storage. This includes your backup, your email (if you use iCloud Mail), and any documents you store in iCloud Drive. If your backup is 3 GB and you have 2 GB of email, you have used all 5 GB and cannot back up more until you delete something or buy more storage.

If you need more space, you can buy iCloud+ through Settings. A 50 GB plan costs a few dollars per month and is usually enough for one person. A 200 GB plan costs more and can cover a family. A 2 TB plan is for people with very large photo libraries or many devices. When you buy iCloud+, you also get features like Hide My Email, iCloud Private Relay, and HomeKit find Video — these are included in the price, not extras.

Family members can share an iCloud+ plan if you set up Family Sharing. Each person gets their own backup and their own private data, but you all share the storage pool. To set this up, go to Settings, your name, Family Sharing, and follow the prompts.

Restoring your iPhone from an iCloud backup

When you set up a new iPhone or erase and reset an old one, you can restore from your iCloud backup during the setup process. Turn on the new phone and follow the on-screen steps until you reach the Apps & Data screen. Tap Restore from iCloud Backup, then sign in with your Apple ID. Choose the backup you want to restore from (usually the most recent one), and the phone will read your data.

The restore process can take 30 minutes to several hours depending on how much data you have and your internet speed. Keep the phone plugged in and on Wi-Fi during this time. Do not unplug it or turn it off. Once the restore is complete, your apps will start downloading automatically from the App Store, and your messages, photos, and settings will be in place.

If you are restoring to the same iPhone you backed up from (after erasing it), the process is the same. Go to Settings, General, Transfer or Reset, Erase All Content and Settings. When the phone restarts, go through setup and choose Restore from iCloud Backup.

Troubleshooting when backup is not working

If your backup has not happened in several days, the most common reason is that your phone is not meeting the backup conditions. Check that you are plugged in, the screen is locked, and you are on Wi-Fi. Even if you are on Wi-Fi at home, if your phone is in your pocket or in use, the backup will not start. Leave it plugged in and untouched for at least an hour.

If you are running out of iCloud storage, your backup will fail silently — you will not get an error message, but the backup will not complete. Check your storage in Settings, your name, iCloud, Manage Storage. If you are full, delete old backups of devices you no longer own, or buy more storage.

If you see an error message when you try to back up, make sure you are signed into iCloud. Go to Settings, your name, and check that you are logged in. If you are not, sign in with your Apple ID. If you are signed in but still seeing errors, try turning iCloud Backup off and back on again. If the problem continues, restart your phone and try again.

Frequently Asked Questions

Can I back up my iPhone without Wi-Fi?

iCloud backup requires Wi-Fi — it will not work over cellular data. If you do not have Wi-Fi at home, you can back up at a coffee shop, library, or any place with free Wi-Fi. Just plug in your phone, lock it, and let it sit for an hour or more.

What happens to my old backup when I create a new one?

iCloud keeps only one backup per device at a time. When you create a new backup, it replaces the old one. You cannot go back to a backup from last month — only the most recent one is saved. If you need to keep old backups, you must use a computer and iTunes instead.

If I turn off iCloud backup, do I lose my old backup?

Turning off iCloud backup does not delete your existing backup right away. It stays in iCloud for 180 days. If you turn iCloud backup back on within that time, your old backup is still there. After 180 days, iCloud deletes it to free up space.

Can I back up to iCloud and to a computer at the same time?

Yes. You can have an iCloud backup running automatically and also plug your iPhone into a computer to create a backup in iTunes or Finder. Having both does not cause problems — they are separate backups stored in different places.

Does iCloud backup include my passwords and credit cards?

Passwords and credit card information stored in your keychain are backed up to iCloud, but they are encrypted and Apple cannot see them. When you restore from backup, your passwords and cards come back with your other data. This is safe — the encryption means only you can access them.