Professional Hard Drive Eraser / Wiper USB Flash Drive / CD Disc Disk Combo 32/64Bit When most computers 'delete' a file it does not actually remove the contents of the file but rather simply unlinks the file from the file directory system, leaving the contents of the file in the disk sectors. This data will remain there until the operating system uses those sectors when writing new data. Until the old data is overwritten (and this may take months or longer) it can be recovered by programs that read disk sectors directly, such as forensic software. This disk will wipe ANY computers hard drive BEYOND recovery or repair Meets DoD 5220.22-M Hard Drive Erase Standards Advanced options allow for sector rewrite passes which allows the data on every sector of the drive to be rewritten to "0" and then it can perform this operation several times over to ensure complete deletion despite bad disk sectors or other issues that may be present. When you need to delete your drive, simply a boot up away from complete data destruction leaving you safe from prying eyes, data sniffers, and Identity theft!