Android Marshmallow and Nougat OS has a trash folder for deleted photos, just in case one day you decide to recover some of them. Naturally, deleted images that are stored in trash folder requires extra memory space from Android device and that’s the main reason why most users decide to empty photo gallery trash folder. Or maybe there’s some images you simply want to be completely removed from your phone, so neither you, nor anyone else will be able to access them.
