I need the option of overwriting the file using the 00 or FF. What I mean is visible to erase the files to make it easier to recover accidentally deleted data. A deleted file is divided into two parts and recovery programs can not cope with finding the second part. So I want to erase the visible data to keep only those that are to be recoverable unconventional method. Can you help me by adding an option to erase using the formula 0000 or FFFF ...?