I looked online but couldn't find the full manual to give you a link. But it's on page 69. You can get the full manual on the cd. But I'll try to type it here....
I think you first put it in Playback mode using the switch on the back.
You can copy pictures between built-in memory and memory card.
Set-up: Press [MENU/SET]-> [PLAYBACK] menu-> Select [COPY]
Select the copy method (direction) IN>SD copies all pictures to card
I have this model of a Panasonic Lumex plus an earlier one: DMC-FS15. I have photos on the internal memories of both of them and can't seem to figure out how to remove them (I never wanted them there in the first place and have no idea how that even happened...). I have tried with the cable on the later model -- to no avail. I am trying on my iMAC (OS X 10.6.4). I have a PC laptop but would rather do all my photography on the MAC and when I tried to remove those on the earlier model with the PC, it didn't work anyway.