How to back up the data on the mobile phone to the cloud?

Take OPPO R9S mobile phone as an example, the specific method is as follows:

First, find "Settings" on the phone desktop, and click Enter.

Second, after entering, find "Cloud Service" and click Enter.

Third, after entering, find the "backup" column and click enter.

Fourth, after entering the backup, turn on the switch in the "OPPO Cloud Backup" column, and then click Backup Now.