Transfer Lumix Lx-3 Photos in Memory to SD Card
If you take a photo while your SD card is out of your camera, it will get recorded to the camera’s flash memory. You can use the USB cable to connect the camera to the computer, but I typically stash the cable and transfer the photos to the SD card.
Menu/Set > Playback (not Playback mode) > Copy (the last menu item - p 3)