Using this Double Deck Holder 200+ XL is easy. First, open the wide - opening lid, which is made possible by the Cobra Neck technology. Then, take out the removable inner deck holders. You can place up to 100 double - sleeved cards in each holder, and then put them back into the main holder. Whether you're storing two complete decks or just a collection of up to 200 double - sleeved cards, this holder has you covered. When it comes to oversized cards, simply place them in the holder as you would with regular ones. As for maintenance, keep it in a dry place to prevent damage. Avoid dropping it or subjecting it to excessive force. If it gets dirty, you can use a soft, dry cloth to wipe it clean. With proper use and care, this holder will serve you well for a long time.