Using the Blue Bastion 100+ XL is a breeze. First, open the box using the click - lock mechanism. You can then place your double - sleeved cards with thick inner sleeves inside. When storing, make sure the cards are neatly arranged to avoid any damage. As for the top or Commander card, enjoy the convenience of seeing it through the translucent material without opening the box. If you're playing a trading card game, simply convert the two symmetrical parts into a card pile and discard pile holder. When not in use, keep the box in a cool and dry place to maintain its durability. Avoid exposing it to extreme temperatures or rough handling as this may affect the click - lock mechanism and the overall structure of the box.