Sony and Panasonic have named the next-generation storage discs that will be the successor to Blu-Ray. They revealed it will be called the Archival Disc. It will eventually hold 1TB of data, the equivalent of 250 DVD films. 300GB versions of the discs will be launched in 2015. They will be aimed at big companies that need to store vast amounts of data. The firms signed an agreement to work on the next-generation storage medium last summer. The first iteration will be a double-sided disc with three layers of data per side with 300GB capacity, it revealed. Current dual-layer Blu-ray discs can store up to 50GB of data. Over time the firms will roll out 500GB and 1TB versions of the disk, a joint statement from the firms said.