I have a newer gold Tevo Tornado that sat in the box for a few years. I lost the instructions but YouTube told me how to assemble it. The SD card could not be read by the printer, PC, or a Mac. I bought a new SD card and the printer can see it and the folder on the SD card. However, the print file can’t be see in or out of the folder. Was there supposed to something on the SD card I needed? I don’t know what to do to the printer to see file to print.
Do you have a thumb drive? If you do, you can plug the thumb drive into your PC or Mac send the files to thumb drive and if there is a USB port plug the thumb drive into your 3D Printer and it should scan the thumb drive and print your object.