To use the graded card case, simply open the case and gently place your graded card slabs inside. Make sure to arrange them neatly to maximize the space. When traveling, you can carry it like a small briefcase. As for precautions, avoid dropping the case from a high place or subjecting it to strong impacts. For maintenance, wipe the case with a soft, dry cloth regularly to keep it clean. If it gets wet, dry it thoroughly to maintain its waterproof and dustproof performance.