It may be that these voices have become a cache, which occupies the memory of the mobile phone. I can choose to clean it:

1, there is a mobile phone slimming in the garbage cleaning of Tencent mobile phone housekeeper, which can be used to clean files on mobile phones. You can use this to clean certain types of mobile phone files;

2. If you want more memory and don't want to delete mobile phone files, you can buy a larger mobile phone sd card and move the files from the previous sd card into it.