Sometimes you can recover data over the SPI interface instead of the proprietary SD interface. Essentially, plug it into an arduino with one of the many SD card

Sometimes you can recover data over the SPI interface instead of the proprietary SD interface. Essentially, plug it into an arduino with one of the many SD card libraries and slowly dump the data over the serial link. I'm unsure if this is just urban legend or not, though. I've never tried myself.