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How to manage deleted files on Windows and Android
Learn how to permanently delete Windows and Android files.
Without any files selected, click Empty recycle bin to erase everything permanently or Restore all items to bring them all back to your PC. Inside Samsung Gallery, you can tap the three horizontal lines (bottom right) and then Recycle bin to view, erase, and restore photos and videos you’ve deleted. There’s a Recycle bin link on the front screen of the app: tap on this to see recently deleted files and to find options to wipe them permanently or restore them to their original locations.
Or read this on The Verge