Preserve critical assets with the 5.5TB Optical Disc Archive Gen 3 Cartridge from Sony. Designed for long-term storage up to 100 years, the Optical Disc Archive provides 5.5TB of space for your historically-important files. With read and write speeds up to 375 and 187.5 MB/s, respectively, this cartridge uses the Universal Disc Format (UDF) file system for open, vendor-agnostic operation. Along with write once read many (WORM) functionality, this cartridge is also PetaSite compatible after a firmware upgrade. This Gen 3 cartridge is read compatible with Gen 1 and 2 drives and write compatible with Gen 2 drives.