MBot3D Cube Issue

I recently got the MBot Cube from a friend who was having issues with it. He didn’t know what was wrong so he asked me to take a look. Thing is, I also have no idea what is wrong with it. My computer won’t detect the printer when I plug it in and when I try to use an SD card to print it just says “SD Card is empty.” I know that the SD card is not empty though because the Gcode files show up when I plug the SD card into my computer. Everything else works great as far as I can tell but these problems make the printer unusable. Does anyone know anything that I might not? Any help is greatly appreciated. Thank you in advance!

What format are you using? The stock board only reads X3G files.

I’m using .gcode files currently. Do you know how I can convert gcode files to x3g?