Diskettes can melt in an automobile parked in the sun. Documents can be softened on a sunlit window sill or desktop. Keep your diskettes dry at all times. Rain and excessive humidity will destroy your files. Pockets do not protect your diskettes against perspiration.
Backpacks are ineffective against rain.
Do not bring a cold diskette into a humid environment, otherwise water vapor from the surrounding air will condense on your diskette and render it useless. Pockets, books and backpacks are terrible places to put diskettes. Keep your diskettes in a rugged container which can withstand the unexpectedly high stresses which occur when you are transporting your diskettes in your backpack. Carrying your diskette in your pocket or backpack will cause hair, lint and dirt to work its way inside your diskette. Using an eraser on your diskette's label, drinking beverages or smoking near your diskette, or doing anything that introduces the slightest risk of contamination to your diskette is risky business.