It's about half as much as Watson.
In other words, 2,000,000,000 kilobytes is 0.470 times the amount of Watson, and the amount of Watson is 2.10 times that amount.(data store only)
Watson, the IBM supercomputer famous for competing against humans on the televised trivia game show Jeopardy!, utilizes 4,300,000,000 kilobytes of variously-structured data to formulate answers. While "thinking", Watson processes about 520,000,000 kilobytes of data per second.
It's about three-tenths as much as a Gap, Inc. Customer Database.
In other words, the amount of a Gap, Inc. Customer Database is 3 times 2,000,000,000 kilobytes.(a.k.a. The GAP Companies, a.k.a. Gap) (2012 figures)
The GAP Inc., the corporate parent of GAP store, Old Navy, and Banana Republic, has accumulated over 8,000,000,000 kilobytes of data on almost a billion customers. The GAP, Inc remains the largest apparel retailer in the United States and was the largest in the world from the mid-1990s until about 2008.
It's about twelve times as much as an iPod.
In other words, 2,000,000,000 kilobytes is 11.90 times the amount of an iPod, and the amount of an iPod is 0.084 times that amount.(a.k.a. Apple iPod) (2010 figures; for iPod classic, sixth generation)
A sixth-generation, iPod classic MP3 player offers a storage capacity of 168,000,000 kilobytes. Data is stored in the unit's hard drive, a 5,400 RPM SATA drive, which measures about 30 sq. cm (5 sq. in)
It's about one-twenty-fifth as much as The Amazon.com's databases.
In other words, 2,000,000,000 kilobytes is 0.0440182 times the amount of The Amazon.com's databases, and the amount of The Amazon.com's databases is 22.71790 times that amount.(largest databases only; 2005 figures)
Amazon.com maintains information on the millions of items sold on it's e-Commerce website and the websites of its affiliate companies, as well as information on customer orders and browsing history, and excerpts from nearly a quarter-billion books in databases totaling an estimated 46,526,300,000 kilobytes of data. Amazon.com receives over 615 million visits to its US website each year.
It's about forty times as much as Wikipedia.
In other words, the amount of Wikipedia is 0.028 times 2,000,000,000 kilobytes.(2009 figures) (all languages)
As of 2009, Wikipedia held 56,000,000 kilobytes of publicly written and edited encyclopedia articles on 14.5 million subjects as well as associated commentary and discussion. Wikipedia is among the ten most popular websites on the Internet and the only non-profit entity in that group.
It's about one-fortieth as much as The Google Earth database.
In other words, 2,000,000,000 kilobytes is 0.0264 times the amount of The Google Earth database, and the amount of The Google Earth database is 37.90 times that amount.(2006 figures) (raw imagery and indexes storage)
As of 2006, Google was storing 75,700,000,000 kilobytes of raw image and index data for its satellite photo and virtual globe application, Google Earth. The application offers high resolution satellite imagery of 60% of the populated areas of the world, according to 2010 estimates.
It's about forty times as much as a Blu-ray Disc.
In other words, the amount of a Blu-ray Disc is 0.026 times 2,000,000,000 kilobytes.(a.k.a. BD) (dual-layer; Blu-ray disc)
A typical Blu-ray disc will hold 52,000,000 kilobytes of data. The increase in capacity versus a standard DVD is possible because of the smaller wavelength of blue light — 405 nanometers instead of 650 nanometers for the red laser light used in a DVD.