Remember to ask you customer what type of memory card their particular device needs.
And be sure to let customers know they can easily move files between devices that use the same format memory card.
Last, let customers know that if they want to transfer the files from the memory card to a computer they will either need to connect the device (smartphone for example) to the computer or use a memory card reader. Some computers have built-in card readers. Readers can also be purchase separately.