When the memory is full, it's time to clean it up. You can use Tencent's mobile phone housekeeper, which has the function of garbage cleaning. Housekeeper's Home Page-Cleaning Acceleration-Slimming of Mobile Phone-Wechat Cleaning, where you can select junk files, useless pictures, video pictures of friends you have seen, files generated during WeChat cache and chat, etc. , so that the files you don't want to delete will be kept and the rest will be deleted.