NovaMaker prepares the model by slicing it into individual layers and saving it as a .cws file which can be directly read by the printer. You can save. cws file on a USB flash drive and plug it into the port at the back of the device. Select "file" on the touch screen of the printer and browse the U disk file, then select "print" button, the files are automatically copied to the printer file directory. After that, you can pull out the USB flash drive. Finally, select the file in the list, and click on "print" button again, the printers start working.