Canon EOS 5Ds Instruction Manual page 25

Cards
To protect the card and its recorded data, note the following:
Do not drop, bend, or wet the card. Do not subject it to excessive force,
physical shock, or vibration.
Do not touch the card's electronic contacts with your fingers or anything
metallic.
Do not affix any stickers, etc., on the card.
Do not store or use the card near anything that has a strong magnetic field,
such as a TV set, speakers, or magnet. Also avoid places prone to having
static electricity.
Do not leave the card in direct sunlight or near a heat source.
Store the card in a case.
Do not store the card in hot, dusty, or humid locations.
Lens
After detaching the lens from the camera, put down the
lens with the rear end up and attach the rear lens cap to
avoid scratching the lens surface and electrical contacts.
Handling Precautions
Contacts
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