Dear Student, Storjng of magnet is dependent on the material used to create the particular magnet. In general we can say that room temprature is adequate to store them or lower temprature below curie temprature. Curie Temprature is the one above which the magnet gets demagnetized. In a box where a metal cannot attract any metal debris. If more than one magnet needs to be stored then Attracting position is the best for storing purpose. Regards.