Using this Double Deck Holder 200+ XL is easy. First, remove the inner deck holders if you like. Then, place your double - sleeved cards in the holders, up to 100 cards in each. Put the holders back into the main case. When you need to get to your cards, the wide - opening lid, thanks to the Cobra Neck technology, makes it simple to access them. As for maintenance, just keep it in a dry place to prevent damage. Also, don't try to force too many cards in at once, as it's designed for a specific capacity.