I'm sorry for the inconvenience. According to your description, I suggest you try the following actions to solve it:

1. Go to Security Assistant-Mobile Phone Acceleration-Cache Cleaning, and clean the cache file.

2. Go to Settings-More Settings-Applications-Installed. Move the software installed in the system space to the SD card, and set the SD card as the preferred installation location.

3. Go to Settings-More Settings-Applications-Find the programs you often use in the installed program, click to enter the information interface of the program, and select Clear Cache and Data.

4. You can delete the cache folder in file management, except for Android directory and DICM, all other folders can be deleted.

5. If necessary, you can restore the factory settings-erase all data. You can use the cloud service of your mobile phone to back up important data first. Please rest assured that the data in SIM card and SD card will not be cleared.

If you have any questions, please feel free to consult us. Thank you very much for your support of our vivo. I wish you a happy life!