1. Cached data of the application: Cached data will be generated when the application runs, and these data will be stored in the memory of the mobile phone. Some applications have been deleted, but the cached data of these applications still exist in the mobile phone memory, so the mobile phone memory will become larger because of these cached data.
2. Photos and videos: Photos and video files in the mobile phone will also take up a lot of memory space. Some photos and videos have been deleted, but these files still exist in the memory of the mobile phone, so the memory space of the mobile phone will increase because of these files.