It's about one-six-hundred-fiftieth as much as Pandora
The amount of Pandora is about 250,000 gigabytes.
(a.k.a. Pandora Radio) (2011 figures)
Pandora, the online radio and song recommendation service, stores 260,000 gigabytes of music. Its music recommendation service categorizes each song in its library using 400 attributes and 2,000 attribute combinations.