Panasonic Toughbook CF-U1AQB1G2M Reference Manual page 39

SD Memory Card
To remove the card
Preparation
Save the data and close all applications.
Open the cover and confirm the SD Memory Card indicator (A) is off.
1
Disable the card function.
Click on the notification area and select the card, then click [OK].
A
This step is not necessary when removing the card after turning off the
computer.
2
Remove the card.
Press the card so it comes out of the slot.
A
Draw it straight out.
B
39
A