I dont have your scanner but I have a Primefilm and yours should do the same as mine. You will have some software that will allow you to scan a negative and convert it to a positive image. You ask why scan a negative if you have a photo. Well you will get a better image from the negative than you would from a positive image. When you scan a positive photo it will be on photo paper and if you try to get a large scan you will most probably pick up the grain in the paper and magnify that so spoiling thr scanned image. This you wont get(or unlikely to get) from the negative. I hope this helps.