Optical discs have long been an important medium for storing high-quality videos. They have always been reliable. Many classic TV series and movies are now stored on Blu-ray discs. Whenever we want to watch them, we can insert the Blu-ray disc into the drive and enjoy the cinematic experience at home. However, as a physical medium, our Blu-ray discs are at risk of external damage sometimes, and we may also lose some discs during use. Any damage to the surface of the disc is likely to cause corruption of the video data contained within. To ensure that our film and TV collection is not too affected, we had better copy the content to a new disc as a backup in advance. This article is a detailed guide to copying and backing up Blu-ray discs. We will tell you everything you need to prepare before you start and offer you the best assistance and specific methods from the perspectives of ordinary discs, Cinavia-protected discs, and 4K UHD discs.