looks like it's currently runing some sort of arduino.
Doesn't even have a control panel. That sucks.

So what you need is a board AND a screen/control panel. It's the panel that add's sd slot and wifi connectivity (depends on screen).

You could probably get away with something really basic like this: https://www.ebay.co.uk/itm/3D-Printe...QAAOSwwo1XfxeO

Or go for the smoothie ware compatible board and touchscreen which you can add a wifi module to: https://www.ebay.co.uk/itm/MKS-SBASE...oAAOSwKjha78Iw

You can go even more downmarket if you want with a ramps and basic lcd screen. But As I've never used ramps - I'll stick with what I know :-)