Sony PCG-XG28 Primary User Manual page 55

Double-click in the system task tray.
The "Unplug or Eject hardware" dialog box appears.
In the Unplug or Eject Hardware dialog box, select the appropriate
option, and then click Stop.
Confirm the device and click OK.
A message appears informing you that the device can now be safely
removed from the system.
Press the PC card RELEASE button to remove the PC card.