The storage and usage temperature of magnets should be within the individual raw material specification limits. It is not recommended to store magnets near other stronger magnets or near equipment generating magnetic fields. Magnets may affect the functionality of other appliances such as notebook computers or external hard drives.
Some types of magnets such as Semarium-Cobalt are very strong and also brittle. As a result they may easily break into pieces if dropped accidentally. When two strong magnets are brought together and clicked, their brittle nature can cause pieces of magnets breaking away. When larger magnets are brought together, it can become a pinching hazard if proper caution is not exercised.