I try to store unopened sheet film boxes in the meat keeper tray in the refrigerator when my wife will allow. Others have said that they store 35mm & roll film in original packaging in ziplock plastic bags either in refrigerator or freezer. Whichever place, just remember to allow time to warm to room temp before opening to avoid condensation. From refrig allow 1-2 hours. From freezer allow at least 3 hrs to be sure. Even better remove the night before. I usually buy paper in boxes of 25 sheets and keep at room temp. I do not store any paper in the darkroom.