Digital Video Disc or Digital Versatile Disc is an optical storage medium used to store digital data such as computer files, software, videos and films.
There are a few different types of DVD disc: Single sided discs can hold 4.7 GB of data. Roughly 2 hours of video at standard definition. Single sided dual layer discs can hold 8.5 GB of data – roughly 4 hours of video at standard definition. Double sided single layer discs can hold 9.4 GB of data. Double sided dual layer discs can hold 17.08 GB of data