I have recordings that are on my external hard drive on the 9400, if i purchase the 9500 can i hook up the external hard drive to the 9500 and still be able to access them, or will they be lost and have to format the hard drive to use it with the 9500. Having some issues with the 9400 so just wondering how I can save and use my recordings on the 9500, if I purchase the 9500