MicroSD/SD Combo Duplicators for multi targets which conveniently copies the two most popular digital media, without a computer. Advanced asynchronous duplication means no waiting and no interruption as each channel can independently load, unload, and copy. Secure Digital Card Duplicator is a high speed, stand-alone, hardware based MicroSD/SD Duplicator. Synchronous and Asynchronous Copy modes: 1. Synchronous Copy Mode: All cards/drives must be inserted and execute the copy or compare function at the same time. All target cards/ drives will have the same progress simultaneously. In this mode, the system will start the copy or compare function when the ENT button is pressed or automatically when writer trays are all loaded. 2. Asynchronous Copy Mode: The system will read the data from the source card/ drive into system’s memory first, then copy to target card(s)/ drive(s) as they are inserted. The process is continuous as each card/ drive executes the function individually. User may take out a card/ drive that is complete and insert another one to continue with a new copy. Note: The duplicator will format the target cards/ drives to be the same as the source card/ drive. All data left on the target cards/ drives will be overwritten (erased) after duplication. The contents of target cards/ drives will be exactly the same as the source card/drive.