Over the years I have accumulated a lot of commercial dvds and later blu rays that are no longer available to be replaced if damaged. I would like to make copies of these strictly for my own use. What's a reliable, reasonably easy to use copy software that I can install that will copy my dvds and blu rays? I have read conflicting online reviews that state how great some are but users pan them. I will emphasize again it will be used strictly for preservation of dvds I have already purchased.