I have not tried it with a hard drive but with a flash drive yes It dose work the flash drive has to be formatted to fat 32 for the iPad to read it with the camera kit if it dose not read it the first time try agin or have it connected to the iPad and turn of the iPad then turn it back on while the USB is still attached if you get an error saying that this device is not supported then you did it right and it will be visible on the Ifile