The ISO DVD/CD duplicator’s hard drive (HDD) can be connected to a computer. When the USB 3.0 switch is turned on, the computer will see the duplicator’s HDD as an external HDD. Now you can easily drag and drop the ISO file from the computer to the duplicator’s HDD and use it as the source master for duplication. No special software is needed. This feature is unique and will save time by not having to create a master disc on computer which is currently required on all other duplicator systems.