Apple PowerBook G3 - Manual (Page 17)

4 Hold the module by the gripping surface and pull it out of the computer.
IMPORTANT You should not remove an expansion bay module if it is in use or
you may lose data. If you try to remove the module when it is in use, you’ll
see a message telling you to reinsert it. Reinsert the module, quit any files or
programs that may be using the floppy disk (or other medium inserted in the
module), then select the disk’s icon and choose Put Away from the File menu
or drag the disk’s icon to the Trash. (If the module contains the startup disk,
you can’t remove the module or drag the disk to the Trash.)
To be sure that you don’t get another in-use message, wait 5 seconds after
quitting programs and ejecting a disk before you remove the module.
If you put your computer to sleep while a floppy disk or other medium is
inserted, the green in-use light to the left of the module will flash (similar to
the sleep indicator light on your computer’s display). You should not remove
the module while the in-use light is on or flashing.
Hold the module by the gripping surface
and pull it completely out of the computer.
The module release latch automatically slides back
into its proper position as you remove the module.
Gripping surface
17 Using Expansion Bay Modules and PC Cards