On the mobile phone desktop, open file management.

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Enter the file management page and click Clean at the bottom.

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Go to the garbage cleaning page and click on the mobile phone in the upper right corner to slim down.

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Go to the slimming page of the mobile phone, slide down the page and find the big file.

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Other files stored internally will be displayed below the large file. Click to clean up.

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Enter the big file page, select the file to delete, and then click Delete the selected file.

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A dialog box appears and click OK.

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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.

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After cleaning, the large file page will be blank, which means that all other files in the internal storage space have been deleted.