Thanks for the fast reply. We may have different models then. I can open the bottom panel screws with a 3mm allen key, but there's no SD card visible on the panel, or the circuit board underbelly that's visible after removing the panel. The switches and plugs that connect to the board on the back panel (USB, Ethernet, power, etc.,) are secured with a torx like screw with a pin in the middle, and this prevents pulling the board out to look on top.

Maybe this was an earlier model, S/N
47141011907001