DVD-R refers to a writable DVD; a DVD that can be authored at home using a burner. The descriptors 4x and 16x refer to the write speed the DVD supports. The write speed is the speed at which information/data is written to the DVD. DVD-Rs have a 4.71 GB storage capacity. The only differences between 4x and 16x DVD-Rs are the rate that data is written and the time it takes to write the data. Writer Bio
