How to back up your iPhone, iPad, or iPod touch with Windows
If you back up your iPhone, iPad, or iPod touch, you'll have a copy of your information to use in case your device is ever replaced, lost, or damaged.
Open the Finder on your Mac, or open the Apple Devices app on your PC. If your PC doesn't have the Apple Devices app, or your Mac is using macOS Mojave or earlier, open iTunes instead.
Connect your device to your PC using the cable that came with your device. Find cables for your device.
If asked for your device passcode or to Trust This Computer, follow the onscreen steps. Get help if you forgot your passcode.
Select your device in iTunes. Learn what to do if your device doesn't appear on your computer.
Click General in the Apple Devices app or Summary in iTunes.
If you want to save Health and Activity data from your device or Apple Watch, you need to encrypt your backup. Select the "Encrypt local backup" checkbox and create a memorable password. Write down your password and store it somewhere safe, because there's no way to recover your encrypted backups without this password.
Click Back Up Now.
When the process ends, you can see if the backup finished successfully. You'll see the date and time of your last backup.
When the process ends, the date and time of your last backup appears in the Finder window.