The simplest way: iCloud backup over Wi-Fi

The easiest path is to let your iPhone back itself up to iCloud, Apple's cloud storage service. Your phone does this automatically when it is plugged in, locked, and connected to Wi-Fi — you do not have to remember to do anything. This backs up your photos, messages, contacts, settings, and app data.

To turn this on, go to Settings, tap your name at the top, then tap iCloud. Scroll down and tap iCloud Backup. Toggle it on (the switch will turn green). Your phone will back up the next time it meets those three conditions: plugged in, locked, and on Wi-Fi. You can check if it worked by going back to that same screen — it will show the date and time of your last backup.

iCloud gives you 5 gigabytes free, which is enough for most people unless you have thousands of photos. If you run out of space, you can buy more storage (50 GB, 200 GB, or 2 TB monthly plans) or delete old backups to make room.

Key Takeaways

  • iCloud backup happens automatically when your iPhone is plugged in, locked, and on Wi-Fi, and requires no action from you after you turn it on.
  • You can back up to a computer using a USB cable and the Finder app (Mac) or iTunes (Windows) if you prefer to keep your data on your own device instead of in the cloud.
  • A backup includes your photos, messages, contacts, app data, and settings, but not apps themselves — those read fresh from the App Store when you restore.
  • You can start a backup manually at any time by going to Settings, your name, iCloud, iCloud Backup, and tapping "Back Up Now".
  • If your iPhone is stolen or broken, you can restore from your backup by signing into iCloud on a new phone during setup.

Backing up to your computer instead of the cloud

If you do not want your data stored on Apple's servers, you can back up to a Mac or Windows computer using a USB cable. This creates a file on your computer that contains everything on your phone.

On a Mac running Monterey or newer, plug in your iPhone with a USB cable, open Finder, and click your phone's name in the sidebar. Click General, then under "Backups" click Back Up Now. On older Macs or any Windows computer, use iTunes instead — plug in, click the phone icon, and click Back Up Now.

This backup sits on your computer's hard drive. It is not automatic like iCloud, so you have to plug in and do it yourself. The advantage is that your data never leaves your computer. The disadvantage is that if your computer breaks or gets stolen, your backup is gone too.

What gets backed up and what does not

A backup saves your photos, videos, messages, contacts, calendar events, notes, reminders, health data, app settings, and home screen layout. It does not save the apps themselves — when you restore from a backup, the apps read fresh from the App Store.

Some things never back up: data stored only in an app's own servers (like Gmail or Slack messages), content you are streaming (like Netflix or Spotify), and anything on your SIM card. If an app stores its data in iCloud instead of in your phone's backup, it will sync to your new phone automatically when you sign in.

Restoring from a backup when you get a new phone

When you set up a new iPhone, you will see a screen asking how you want to set it up. Choose Restore from iCloud Backup if you backed up to iCloud, or Restore from Mac/PC if you backed up to a computer. Sign in with your Apple ID (for iCloud) or plug in the computer (for a computer backup), and your phone will read everything from the backup.

This takes time — anywhere from 15 minutes to an hour depending on how much data you have and how fast your internet is. Keep your phone plugged in and on Wi-Fi until it finishes. Once it is done, your photos, messages, and settings will be exactly as they were on your old phone.

Checking your backup and freeing up space

To see how much iCloud storage you are using, go to Settings, tap your name, then iCloud. You will see a bar showing how much space is used and how much is free. Tap Manage Account Storage to see what is taking up the most room.

If you are out of space, you have two choices: buy more storage, or delete old backups. To delete a backup, go to Settings, your name, iCloud, Manage Account Storage, tap Backups, tap the backup you want to delete (it will show your phone's name and the date), and tap Delete Backup. This frees up space but means you cannot restore from that backup anymore.

Why your backup might not be working

If you see a message that your backup failed, the most common reason is that your phone lost Wi-Fi connection before it finished. Plug in your phone, make sure you are on a strong Wi-Fi network, lock the screen, and wait. It will try again automatically.

If your phone is out of iCloud storage, the backup will not complete. You will see a message saying your account is full. Either buy more storage or delete an old backup to make room. If you are using a computer backup and it keeps failing, try unplugging the USB cable, waiting 10 seconds, and plugging it back in. Sometimes the connection gets stuck.

Frequently Asked Questions

Can I back up my iPhone without Wi-Fi?

iCloud backup requires Wi-Fi. If you do not have Wi-Fi at home, you can back up at a coffee shop, library, or friend's house. Computer backups do not need Wi-Fi — they work over USB cable alone.

Does backing up use my phone's storage space?

No. iCloud backup uses iCloud storage (the 5 GB you get free or the amount you pay for). Computer backups use space on your computer's hard drive. Neither one takes up space on your phone itself.

How often should I back up my iPhone?

If you use iCloud backup, it happens automatically every day when you plug in and lock your phone. If you use a computer, back up at least once a week, or more often if you take a lot of photos or send important messages you do not want to lose.

What happens if I turn off iCloud backup?

Your phone stops backing up automatically. Any backup that already exists in iCloud stays there, but new changes to your phone will not be saved. If your phone breaks before you back up again, you will lose anything that changed since the last backup.

Can I use both iCloud and computer backups at the same time?

Yes. You can have iCloud backup turned on and also plug into a computer to back up there. Having two backups means if one fails, you still have the other one. This is a good idea if your data is important to you.