What iCloud backup does and what it doesn't cover
iCloud backup stores a copy of your iPhone's data on Apple's servers so you can restore it if your phone is lost, stolen, or broken. When you turn on iCloud backup, it automatically saves your photos, messages, contacts, calendar events, notes, app data, and device settings — but not everything on your phone.
iCloud backup does not save music, movies, or TV shows you bought from iTunes, apps themselves (though your app list is saved), or data from apps that store information only locally. It also does not back up data already stored in other cloud services like Gmail or Outlook. Your phone must be plugged in, connected to Wi-Fi, and locked for automatic backups to run.
Each iCloud account gets 5 GB of free storage. Photos, videos, mail, documents, and backups all share this space. If you run out of room, backups stop until you delete something or pay for more storage — Apple offers plans starting at 50 GB per month for a small fee.
Key Takeaways
- Turn on iCloud backup in Settings > [Your Name] > iCloud > iCloud Backup and toggle it on; your phone will back up automatically when plugged in, locked, and on Wi-Fi.
- iCloud backup saves photos, messages, contacts, app data, and settings, but not music, movies, or apps themselves.
- Free iCloud storage is 5 GB and is shared across all your backups, photos, and mail — check how much you are using before relying on it.
- You can manually start a backup right now by going to Settings > [Your Name] > iCloud > iCloud Backup > Back Up Now, even if your phone is not plugged in.
- If your phone is lost or broken, you restore from an iCloud backup during iPhone setup by signing in with your Apple ID and choosing the backup you want.
How to turn on iCloud backup on your iPhone
Open Settings on your iPhone. Tap your name at the top of the screen, then tap iCloud. Scroll down and tap iCloud Backup. Toggle the switch to on (it will turn green). Your phone will now back up automatically whenever it is plugged in, connected to Wi-Fi, and locked — usually overnight.
If you want to back up right now instead of waiting, stay in the iCloud Backup screen and tap Back Up Now. This works even if your phone is not plugged in, though it uses your cellular data or Wi-Fi. The backup will take a few minutes to an hour depending on how much data you have.
You can check the date and time of your last backup in the same iCloud Backup screen. If it says "Back Up Now" in gray text and will not tap, your phone is already backing up — wait for it to finish before you do anything else.
Understanding iCloud storage and when you run out of space
Your iCloud account comes with 5 GB of free storage. This space holds your iCloud backup, any photos you save to iCloud Photos, your iCloud Mail inbox, and any documents you store in iCloud Drive. When you add them all together, 5 GB fills up quickly — a single iPhone backup can be 2 to 4 GB depending on how many photos and apps you have.
To see how much storage you are using, go to Settings > [Your Name] > iCloud > Manage Storage. The screen shows your total usage and breaks down what is taking up space. If your backup is listed as "Backup" with a size next to it, that is your iCloud backup alone.
If you are out of space, iCloud backup stops running. Your phone will not warn you loudly — it straightforward will not back up until you make room. You can delete old backups, turn off iCloud Photos, or pay for more storage. Apple offers 50 GB for about $0.99 per month, 200 GB for about $2.99 per month, and 2 TB for about $9.99 per month, depending on your country. The paid plans are shared across your entire iCloud account, so family members can use them too if you set up Family Sharing.
What to do if your backup is too large for free storage
If your backup is larger than your remaining free space, you have three options: delete an old backup, reduce what gets backed up, or pay for more storage.
To delete an old backup, go to Settings > [Your Name] > iCloud > Manage Storage > Backups. Tap the backup you want to remove (it will show your phone name and the date it was created). Tap Delete Backup, then confirm. This frees up space when ready, but you lose the ability to restore from that backup if something goes wrong.
To reduce what gets backed up without deleting the whole backup, go to Settings > [Your Name] > iCloud > Manage Storage > Backups > [Your Phone Name]. Scroll down to see which apps are backed up. Toggle off any app you do not need to restore — for example, if you have a large game that you can read again from the App Store, turning off its backup saves space. Photos and messages cannot be turned off here; to exclude them, you would need to delete them from your phone or turn off iCloud Photos entirely.
How to restore from an iCloud backup
Restoring from iCloud happens during iPhone setup, not after. If your phone is new, broken, or has been erased, turn it on and follow the setup screens. When you reach the screen that says "Apps & Data," tap Restore from iCloud Backup. Sign in with your Apple ID and password. Choose which backup you want to restore — the list shows the date and time each backup was created, so pick the most recent one unless you have a reason not to.
The restore process downloads your backup and installs everything back onto your phone. This can take 30 minutes to several hours depending on your backup size and internet speed. Your phone will restart during this time. Do not unplug it or turn it off. Once it finishes, your photos, messages, contacts, and app data will be exactly as they were when that backup was created.
If you already set up your phone and want to restore a backup now, you cannot do it through iCloud Backup settings. You would need to erase your phone (Settings > General > Transfer or Reset > Erase All Content and Settings) and set it up again, choosing to restore from iCloud Backup during setup. This is why keeping a recent backup is important — if something goes wrong, you can get back to where you were.
iCloud backup versus other backup methods
iCloud backup is automatic and requires no cables, but it depends on Wi-Fi and takes up space you might need for photos or mail. Mac or Windows computer backup using iTunes or Finder is faster, does not use iCloud storage, and backs up everything including music and movies — but you have to plug in your phone and manually start the backup each time. Some people use both: iCloud for automatic protection and a computer backup for a complete copy.
iCloud backup also does not back up data from apps that store information only on your phone, like some banking apps or games that save progress locally. If an app has its own backup feature (many do), turn that on separately. Check the app's settings to see if it offers backup to the cloud.
If you use a Windows computer, you can back up through iTunes on Windows or through the iCloud for Windows app, which syncs photos and documents but does not create a full device backup the way a Mac does. If you use a Mac, Finder (on macOS Catalina and later) or iTunes (on older Macs) handles backups when you plug in your phone.
Troubleshooting common iCloud backup problems
If your backup is not running, check three things first: Is your phone plugged in? Is it connected to Wi-Fi? Is it locked? iCloud backup only runs when all three are true. If you have checked all three and it still is not working, go to Settings > [Your Name] > iCloud > iCloud Backup and toggle it off, wait 10 seconds, then toggle it back on.
If you see a message saying your iCloud storage is full, you are out of space. Go to Settings > [Your Name] > iCloud > Manage Storage and delete old backups or photos you no longer need. Alternatively, pay for more storage through the same screen.
If you are trying to restore from a backup and it keeps failing, make sure you are connected to strong Wi-Fi and that you have enough free space on your new phone. If the backup is very old (more than a few years), it may be corrupted. Try restoring from a more recent backup if you have one, or set up your phone fresh and manually sign back into your apps.
Frequently Asked Questions
Does iCloud backup back up my text messages and iMessages?
Yes. iCloud backup saves all your text messages and iMessages, including photos and videos sent through Messages. When you restore from an iCloud backup, your entire message history comes back with it. However, if you have turned off iCloud backup for Messages specifically in Settings > [Your Name] > iCloud > Manage Storage > [Your Phone Name], then messages will not be backed up.
Can I back up my iPhone to iCloud and to my computer at the same time?
Yes. iCloud backup and computer backup are separate and do not interfere with each other. You can have iCloud backup running automatically and also plug your phone into your Mac or Windows computer to create a backup there. Having both gives you extra protection — if iCloud fails, you still have the computer backup.
What happens to my iCloud backup if I stop paying for extra storage?
If you are using paid iCloud storage and your subscription ends, you have 30 days to renew or buy more storage before your backup is deleted. During those 30 days, your backup is still there but not being updated. After 30 days, Apple deletes it. Your photos and mail are not affected — only the backup itself is removed.
Can I see what is in my iCloud backup before I restore it?
No. iCloud backup is all-or-nothing — you cannot preview what is in it or pick and choose what to restore. When you restore, everything from that backup comes back to your phone. This is why the date and time shown for each backup matters: pick the one closest to when you want your phone restored to.
If I turn off iCloud backup, what happens to my existing backups?
Your existing backups stay in iCloud storage for 180 days. After 180 days, they are automatically deleted. If you turn iCloud backup back on before then, your old backups are still there and you can restore from them. Turning off iCloud backup does not when ready erase anything — it just stops new backups from being created.