What is the capacity of a DVD+R DL disc?
A DVD+R DL disc holds 8.5 gigabytes of data. This is exactly the same as the amount of data on a pre-recorded double layer DVD-Video disc, sometimes referred to as DVD9. A single-layer DVD holds 4.7 gigabytes. Due to the fact that the track distance on both layers of any double-layer DVD is about 10% wider, the total capacity of both layers adds up to 8.5 GB.
