USB/Firewire Device: Used to connect a computer via a USB / Firewire link, to specific drive(s) with an internal USB / Firewire connection on the duplicator so they can be utilized as an external burner. *USB Device with Copy Connect Feature: Able to connect the duplicator directly to a PC for more convenient duplication of master content. *USB Device with Copy Protection Feature: Able to create copy protected DVD Video copies from an original master using the Copy Connect feature. Transfer image files with the embedded protection directly from a PC to the duplicator's internal HDD. *Require Hard Drive.