Não danificará o seu disco rígido, nem pense duas vezes.
Veja aqui por motivos.
The only magnets powerful enough to scrub data from a drive platter are laboratory degaussers or those used by government agencies to wipe bits off media. "In the real world, people are not losing data from magnets," says Bill Rudock, a tech-support engineer with hard-drive maker Seagate. "In every disk," notes Rudock, "there's one heck of a magnet that swings the head."
Existem ímãs dentro do disco rígido também e não são protegidos de qualquer forma.