Can be cleaned in the mobile phone file management. Take Huawei nova2 as an example, the steps are as follows:

1, find and open the mobile phone file management;

2. In the lower left corner of the page, there is the option of "cleaning up and speeding up", click to enter;

3. If the memory has not been cleaned for a period of time, the system will dynamically detect the occupation of mobile phone garbage first, and then clean it with one click after the detection is completed;

4. Slide down the page, find "Find an application that takes up a lot of space", and then click Enter; ;

5. You can see the space occupied by QQapp, and click to enter;

6. In the file and data options, the system will check the suggested cleaning option, which can be cleaned safely, and click Delete;

7. After deletion, you will find that there are still many files occupying the space below, but these files cannot be recovered after deletion. Users can delete files according to their importance, and the usage rate of mobile QQ will be greatly reduced after cleaning.