Using this card vault is easy. First, open the vault by gently pulling it against the magnet's force. Place your deck of up to 50 cards, whether single or double - sleeved, inside the main compartment. You can put your special sleeved cards in the two protected pockets to show them off and keep them safe. If you have Power Counters or other small accessories, store them in the drawer. When closing the vault, make sure it aligns properly so the magnet can hold it shut. As for maintenance, keep it in a dry and cool place to prevent any damage to the magnet or the material of the vault. Avoid dropping it or applying excessive force, as this could break the magnet or damage the pockets and drawer.