Sony PCG-F520 - Manuel (Page 39)

Using PC Cards '
To remove a PC card
 Close any applications that are using the PC card.
 Click the PC card icon in the taskbar and close the card window.
 Pull the PC card release button up and press it in toward the computer.
 Gently grasp the card and pull it out.
 Insert the PC card slot protector back into the empty slot.