Hi, I'm Pete. Welcome to JustAnswer! I'm reviewing your question now, and will post back with your reply ASAP.
So the emulator has been correctly installed (any jumper settings and required dumpers have already been installed?)And the flat data cable is connected correctly? (the red wire of the flat cable should point to the power connector).
You will also need to ensure that the USB stick is correctly formatted.
You will be able to copy from the USB stick to the keyboard by selecting the "index" on the emulator.
What is the make and model number of the emulator you are using?