The 240 minute discs are dvd9 and the 120 minute discs are dvd5. Since you already have the DL 240 minute discs use the dvd9 option. Next time buy the SL 120 minute discs dvd5 which are cheaper and then you can copy just movie or if you not mind the compression you can do full disc. I usually use dvd5 SL discs and I do full disc but I not mind the compression. Try a movie on both dvd9 and dvd5 discs and see what you like but just use verbatim's or taiyo yuden's for your blank dvd media.