writes "From last summer you might remember the Sony & Panasonic plans to bring next generation optical discs with recording capacity of at least 300GB. Various next-gen optical discs from different companies have been proposed, but this joint effort seems to be still moving forward. The disc is called simply Archival Disc and, roadmap and key specifications are out. First-wave ADs are slated to launch in summer of 2015 and will be able to hold up to 300GB of data. Archival Discs will be double-sided, so this works out to 150GB of data per side. Future versions of the technology will improve storage density, increasing to 500GB (or 250GB per side) and 1TB (500GB per side) as the standard matures."