Comparative list of storage measurement
- Gigabyte = 1 billion bytes
- Gigabytes. According to Wesley Crusher, nanites used in the 24th century had "gigabytes of mechanical computer memory". (TNG: "Evolution")
- Terabyte = 1 trillion bytes
- 3 terabytes. Henry Starling noted that when Captain Janeway and Commander Chakotay attempted to download his database, they had downloaded 3,000 gigabytes of data when Starling forced them to terminate their download. (VOY: "Future's End")
- XB (exact size unknown)
- 19.3 XB. D'Jamat deleted 19.3 XB of data Enterprise had collected on the Delphic Expanse spheres. (ENT: "Chosen Realm")
According to TNG: "The Measure Of A Man", Data was built with the ultimate storage capacity of 800 quadrillion bits. At 8 bits per byte, it can be calculated that Data has 100,000 terabytes of memory.