Hi... Is there an app that will permanently delete a single file on an Android phone's internal storage and/or SD card so that it's not recoverable? I have a file that contains personal data and I want to delete it, but I want to do so in a manner that will keep anyone who finds (or steals) my phone from being able to recover it. Also, does Android have the equivalent concept to the Windows Trash where files are temporarily stored until permanently deleted? If so, where is this? Thanks!