Why do magnets destroys the memory of the computer?

A moving or changing magnetic field induces electrical current in nearby conductors. This principle is at the heart of every electrical generator, motor, loudspeaker, microphone, and inductor in the world. read more

If this magnetic media was exposed to an external magnet, the data could be lost or corrupted. Flash Memory. More modern forms of portable memory, such as SD memory cards and USB flash drives, do not have magnetic films to record data like their floppy-disk forefathers did. As a result, they are immune to interference from external household magnets. read more