Hardwipe

Hardwipe is a free data sanitization toolset used by activists, journalists, IT technicians and anyone needing to ensure that discarded, but sensitive, information can never be recovered by someone else. Hardwipe provides a slick user interface with optional support for 'right-click' context menus in Windows File Explorer. Use Hardwipe to conveniently and permanently erase (or 'hard wipe') data on disk and portable storage media.