Lenovo ThinkPad T420 User Manual page 170

1. Unlock the bay lock latch (1) by sliding it to the top. While holding the bay lock latch in the unlocked
position, slide the bay eject latch (2) to the left, then pull out the Ultrabay device (3).
Note: The computer returns from sleep (standby) mode and the pop-up window appears; then the
computer automatically goes into sleep (standby) mode again. The bay status indicator (1) turns off.
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