1. File cleaning:
Coloros version 3.0-7.2: file management >; Clean up the storage space > click clean up to start cleaning up the file data;
ColorOS 1 1 and above: Go to Settings > Storage Space > Cleaning (or Mobile Manager >; Clean up the storage), and after cleaning, "Optimize album storage space" will appear. Click "Go" to open "Optimize Storage Space" and save the original photos to the cloud. The mobile phone only keeps a small-sized version, and can perform operations including photo cleaning, video cleaning, application uninstallation, application slimming, document cleaning, cloud migration, etc., which is simple and quick.
2. There are many photos and videos taken by the camera, which are regularly saved to storage devices such as computers and mobile hard disks, or uploaded to cloud photo albums for preservation;
3. Back up data (contacts, text messages, etc. ), and then click Settings >; Other settings > restore phone > completely erase all data;
(It is recommended that you back up the WeChat chat records before cleaning the space: open WeChat > Me > Settings > Chat > Backup and Migration of Chat Records > Migrate Chat Records to Another Device/Back Up Chat Records to a Computer)
If the above methods can't be solved, please back up your mobile phone data and take your mobile phone, invoice and warranty card to the local OPPO customer service center for testing and confirmation.
Service center inquiry method: OPPO official website-service-outlet inquiry reservation.