Storing and preserving medium format film is important to maintain its quality and longevity. You should store your unexposed and exposed rolls of medium format film in a cool, dry, dark place away from heat, humidity, light, dust, and chemicals. You should also label your rolls with the date, film type, speed, and exposure information. After processing your medium format film, you should store your negatives or slides in archival sleeves or boxes that protect them from scratches, dust, moisture, mold, and fading.