1 file management-file cleaning-start scanning, finish scanning-one-click cleaning.

Or the security center-garbage cleaning-starts scanning, and after scanning-one-click cleaning.

2 Click "Deep Cleaning" after cleaning.

System slimming:

1 Make a system backup first: Open: Settings-All Settings-Reset Phone-Local Backup-New Backup.

After the system is backed up, the system can be stored in Sanqing.

Open: system update-click the menu button-restart recovery.

If it is turned off, press and hold the volume plus button and the power button, and then let go when the boot screen appears, or you can enter the recovery mode.

3 recovery mode: press the volume button to select and press the power button to confirm.

Simplified Chinese-OK-Clear Data-OK-Clear All Data-OK-Return-Restart the phone-Select the nearest system-Restart.

After re-entering the system, you will find that all the software previously installed in the system is gone. Don't worry, just restore the system backup we made before.

The operation is as follows: Settings-All Settings-Reset Mobile Phone-Local Backup-Click on the previously backed-up files-Select All, and click Start Recovery.

5 Wait for the recovery to be completed,

Open: Settings-All Settings-Save

After a look, you can find that the available system storage space has become 1.28G, which is much larger at once.