I know some programs can do it (any free ones?), but I thought there was some sort of low level format command or whatever option that would ensure someone couldn't 'undelete' your files.
A Quick Format will rebuild the file system, volume label, and cluster size. A Full Format will delete the files, rebuild the file system, volume label, cluster size & scan the partition for bad ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results