1. First, on the desktop of Xiaomi's mobile phone, open file management.
2. Enter the file management page and click Clean at the bottom.
3. Enter the garbage cleaning page and click on the mobile phone in the upper right corner to slim down.
4. Enter the slimming page of the mobile phone, slide down the page and find the big file.
5. Other files stored internally will be displayed below the large file. Click to clean it.
6. Enter the big file page, select the file to delete, and then click Delete the selected file.
7. A dialog box appears, and then click OK. It takes time to clean up, and there will be hints that it is being cleaned up, so it is best to keep your mobile phone still.
8. After cleaning, the large file page will be blank, which means that all other files in the internal storage space have been deleted.