Follow the procedures in Before Working Inside Your Computer.
Ensure that your work surface is flat and clean to prevent the computer cover from being scratched.
Turn off your computer (see Turning Off Your Computer).
Removing the ExpressCard:
Press in on the ExpressCard to release it from the computer. Slide the ExpressCard out of the computer.
Installing the ExpressCard:
Slide the ExpressCard in its slot until it clicks in place.
Follow the procedures in After Working Inside Your Computer:
Connect your computer and all attached devices to their electrical outlets.
Turn on your computer.