1, use iCloud to back up data, find "Settings" on iPhone, click Open, and then find "iCloud";
2. Click to open iCloud, slide down and select Backup;
3. Select to open iCloud cloud backup. After the "iCloud cloud backup" function is turned on, when the device is powered on, locked and connected to Wi-Fi, data such as picture library, account information, manuscripts, health data, HomeKit configuration and settings will be automatically backed up. Of course, you can also manually click "Back Up Now";
4. You can also use computer-side iTunes to back up iPhone data, use Lightning data to connect iPhone and computer, and open iTunes software. After iTunes recognizes the iPhone, click the "iPhone" icon in the upper left corner;
5. In the management interface summary of iPhone, check "This computer" and click the "Back up now" button. Note: Before the backup, Restore Backup is grayed out and unavailable. In addition, if you find it impossible to back up, please authorize the current computer with your Apple ID in iTunes.
6. After the backup is completed, you will see "Restore Backup" on iTunes;
7. In this way, the two backup methods are completed, and you can choose your own suitable backup method.