Accidentally deleted the backup of iphone7, how to backup ios 10.3.3?

① First, connect the iOS device (iPhone/iPad) to the computer through the data cable.

② After the ②②iOS device is connected to the computer, open the iTunes tool, then click the device icon to enter the iTunes device management home page, and then click "Back Up Now" on the interface.

③ After clicking Back Up Now, the iTunes tool will automatically back up the device data, and we can see the backup items at the top of the tool.

(4) After the backup is completed, you can see the "Last Backup" time and other information in the "Backup" interface in the middle of the iTunes interface.