In order to be sure that a deleted file really is deleted it is necessary to overwrite the data sectors of that file. Data Destroyer purges data in files, where 'purge' means to destroy, to eliminate completely by overwriting, so that the data cannot be recovered by any means. Data Destroyer allows you to destroy the contents of a file by overwriting it several times (or many times) with random bytes, and with bytes with alternating bit patterns, before the file is deleted (i.e., unlinked). Data Destroyer can purge one or more files in a folder, files of a specified type, or all files in a folder and its subfolders. This software checks for possible input errors, and is designed to minimize the chance of accidentally purging a file that you wish to keep. Another feature of Data Destroyer is that you can get an estimate of the time required to perform a purge operation, based on the total size of the files and the number of times they are to be overwritten.