2. Double-click the iTunes icon to enter iTunes. The mobile phone is connected to the U port of the computer with a data cable. The phone screen pops up "Do you trust this pc?" Click "Trust";
2. A mobile phone icon is displayed in the upper left corner of 2.iTunes interface, and click to enter;
3. The first interface displayed by 3.iTunes is to set the following summary, and the basic information of the mobile phone, such as capacity, phone number and serial number, will be displayed on the right. Below is the backup column. You can choose "iCloud" backup and "This Computer" backup in automatic backup.
4. Select "this computer", that is, the full backup of iPhone will be stored on this computer, and you can encrypt the backup of iPhone or change the password. Then select Backup Now, and select "Backup Application" in the pop-up page;
5. Display the backup progress in the blue progress bar at the top of iTunes, with a text prompt "Backing up my iPhone" at the top. This process takes a long time, so wait patiently for a while, and then back up the iPhone data to your computer.