Two ways to back up your iPhone: iCloud or your computer

You can back up your iPhone in two ways: to iCloud (Apple's cloud storage), which happens automatically over Wi-Fi, or to a computer using iTunes or Finder. A computer backup is useful if you want a copy you control locally, if you don't trust cloud storage, or if you're about to sell or reset your phone and want to keep everything. The computer method stores your entire phone — apps, settings, photos, messages, everything — in a single encrypted file on your Mac or Windows PC.

Both methods work equally well. iCloud is simpler because it runs in the background. A computer backup takes longer the first time but gives you a file you can see and move around. Many people do both: let iCloud run automatically, and also plug in once a month to back up to the computer as a second copy.

Key Takeaways

  • Mac users open Finder, connect the iPhone, and click Back Up Now in the General tab; Windows users read iTunes or use the newer Windows app, then follow the same steps.
  • The first backup takes 10 to 30 minutes depending on how much data is on your phone; later backups are faster because only changes are saved.
  • You need an encrypted backup to restore your passwords and saved Wi-Fi networks; turn on "Encrypt local backup" before you start.
  • Once the backup is done, you can unplug the phone and the file stays on your computer until you delete it manually.

How to back up on a Mac using Finder

On a Mac running macOS Catalina or newer, Finder handles iPhone backups instead of iTunes. Connect your iPhone to the Mac with a USB cable. Open Finder and look for your iPhone in the sidebar under Locations. Click it.

In the window that opens, you'll see a General tab at the top. Look for the section labeled "Backups." Check the box next to "Encrypt local backup" — this protects your passwords and Wi-Fi settings. Then click the "Back Up Now" button. Finder will start copying everything from your phone to the computer. The first backup usually takes 10 to 30 minutes depending on how much data you have. You'll see a progress bar. When it finishes, you can unplug the phone.

After the first backup, you can set up automatic backups. In that same Backups section, check the box for "Back up automatically when this iPhone is connected." Now every time you plug in the phone, a new backup will start in the background.

How to back up on Windows using iTunes or the Windows app

Windows PCs don't have Finder, so you'll use either iTunes or the newer Windows app. If you have iTunes already, you can use that. If not, you can read iTunes from Apple's website, or you can use the Windows app (search for "iPhone Backup" in the Microsoft Store — it's free).

Connect your iPhone to the Windows PC with a USB cable. Open iTunes or the Windows app. Your iPhone should appear in the left sidebar or at the top. Click it. You'll see a Summary or General tab. Look for the Backups section. Check the box for "Encrypt local backup," then click "Back Up Now." The process works the same as on Mac: the first backup takes 10 to 30 minutes, and you'll see a progress bar. When it's done, unplug the phone.

To set up automatic backups on Windows, check the box for "Back up automatically when this iPhone is connected." After that, plugging in the phone will trigger a backup without you having to click anything.

Where the backup file lives on your computer

Once the backup is done, the file sits on your hard drive. You don't need to do anything with it — it's just there. If you ever need to restore your phone, you'll plug it back in, open Finder or iTunes, click your phone, and choose "Restore from Backup." The system will ask which backup you want to use, and it will copy everything back onto the phone.

On a Mac, the backup files are stored in a hidden folder. You don't need to find them yourself — Finder manages them. On Windows, iTunes stores them in a folder deep in your user directory, and the Windows app does the same. Again, you don't need to dig them out. The software knows where they are.

If you want to delete old backups to free up space, you can do that in Finder or iTunes. Go to Preferences (Mac) or Edit > Preferences (Windows), click Devices, and you'll see a list of all your backups. Right-click the one you want to remove and choose Delete.

What happens if you don't encrypt the backup

When you check "Encrypt local backup," the file is protected with a password. Without encryption, the backup file is not password-protected, which means if someone gets access to your computer, they could potentially restore your phone without knowing your iPhone password. Encrypted backups also preserve your saved Wi-Fi passwords and website login information. Unencrypted backups do not.

For this reason, always turn on encryption before backing up. It takes no extra time and makes the backup much more find. If you've already made an unencrypted backup and want to switch, just check the encryption box and run the backup again. The new one will be encrypted.

How often to back up and what to do if something goes wrong

If you set up automatic backups, your phone will back up every time you plug it in. That's frequent enough for most people. If you don't use automatic backups, aim for at least once a month, or before you install a major iOS update, or before you sell or give away the phone.

If the backup fails or gets stuck, unplug the phone, restart both the phone and the computer, and try again. If Finder or iTunes won't recognize the phone, try a different USB cable or a different USB port on the computer — sometimes the cable or port is the problem. If the phone asks you to trust this computer, tap Trust and try the backup again.

If you're backing up before selling the phone and want to make sure all your data is gone, you can erase the phone after the backup is done. Go to Settings > General > Reset > Erase All Content and Settings. This wipes the phone completely. The backup stays on your computer, so you can restore it to a new iPhone later if you want.

Frequently Asked Questions

Can I back up my iPhone to more than one computer?

Yes, but each computer will have its own separate backup file. If you back up to Computer A and then to Computer B, they won't sync with each other — they're independent copies. This is actually useful as a safety measure: if one computer fails, you still have a backup on the other. Just remember that the backup on Computer B won't include anything that happened after you last plugged into Computer A.

What if I don't have a USB cable or my computer doesn't have a USB port?

You can use iCloud instead, which backs up over Wi-Fi and doesn't require a cable. Go to Settings > [Your Name] > iCloud > iCloud Backup and turn it on. The phone will back up automatically when it's plugged into power, connected to Wi-Fi, and locked. This is slower than a computer backup but requires no hardware.

Will backing up to the computer use a lot of space?

Yes. The backup file is roughly the same size as all the data on your phone. If your phone has 64 GB of photos and apps, the backup will take up about 64 GB on your computer. Make sure you have enough free space before you start. You can check how much space is available by going to your computer's storage settings.

Can I back up my iPhone if I've forgotten my passcode?

No. When you plug in the phone, your computer will ask for the passcode before it can back up. If you've forgotten it, you'll need to reset the phone first using Find My iPhone or by taking it to an Apple Store. After the reset, you can set a new passcode and then back up.

Do I need to keep the phone plugged in the whole time the backup is running?

Yes. If you unplug the phone before the backup finishes, it will stop and you'll have to start over. Leave it connected until you see the message that the backup is complete.