The magnets should be kept indoors and dry when stored, otherwise the wet environment can make the magnets rust.
The ambient temperature should not exceed the maximum working temperature of the magnet. When the product is not electroplated, it can be properly coated with oil and rust. Magnets should be kept away from magnetic field sensitive objects such as disks, magnetic CARDS, tapes, computer monitors, watches, etc.
Magnetic material is more brittle, transportation, electroplating (coating), during installation, should ensure magnetism.