Once you load the file to the laser engraver machine from computer, the file would be saved in the memory of the laser engraver machine. Then if you need to process the same file next time, you can take the file directly from the memory and no need to use the computer. Thunder laser cutting machine equips 128M buffer memory which supports to save 99 files at most. Together with the USB disk interface, you can just use the laser engraver machine working even without a computer.