If you are using quality blank DVD media, your ND-32530A has the latest up to date firmware, using the latest versions of AnyDVD-CloneDVD downloaded from the official SlySoft (http://www.slysoft.com) Web site, and ceasing all background operations when burning you backup copies there should be no need to burn 16 speed rated DVD media at 12 speed or 8 speed to achieve quality burns.
Suggest that you ensure that your ND-32530A does in fact have the latest up to date firmware installed. If you are unaware DVD Firmware is the major facture that ensures that you DVD Burner is writing data to blank media in the most optimal manner. Old out of date DVD Firmware can cause improper burning strategies what will cause the necessity to have to reduce burning speeds to produce quality error free burns. Visit the CD Freaks NEC DVD Burner Forum (http://club.cdfreaks.com/forumdisplay.php?f=86) for information on updating your ND-32530A firmware. Vital information is provided in the NEC DVD Burner Forum â€œRead Firstâ€ postings located in the beginning of the Forum.
To obtain the latest NEC ND-32530A firmware visit Forum Members ScorpioSoft NEC DVD Burner Firmware page (http://www.micheldeboer.nl/firmware/) and navigate to the ND-3530 page and you will find the latest NEC ND-32530A firmware.