Here is a list of storage devices: hard disk drive
solid state drive
blu-ray
dvd rom
sd card
usb memory stick
cd rom
magnetic tape

which of these devices can store the most data?
which of these devices can store the least data?
which of these devices is the cheapest per mb?
which of these devices is the most expensive per mb?
which of these devices is easiest to take somewhere with you?
which of these devices is most likely to get damaged?