If I put a magnet to one of those old floppy disks or to a hard disk drive would that in effect be a secure erase?
But interesting when I put a magnet on a hard disk drive platter the magnet had no “pull” effect on it?? Perhaps the shiny silver color coating deflects the effect of magnetism??
Friends say to use a hammer to break a hard disk platter is the easiest and most secure, but sounds messy and a bit dangerous/hazardous to me with pieces of hard disk flying everywhere.