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Equivalents in other units

How much is 604 gigabytes?

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It's about 6,000,000,000 times as much as a Magnetic Stripe Card.
In other words, the amount of a Magnetic Stripe Card is 0.0000000002 times 604 gigabytes.
(maximum capacity; per ISO 7811 specification)
The storage capacity of a magnetic stripe on a credit or identification card is about 0.0000001 gigabytes. According to legend, Forrest Parry, the IBM engineer who developed the first magnetic stripe card in 1960, was able to solve the problem of adhering the strip to the card after his wife suggested using an iron.
It's about 0.00000000002 times as much as All Spoken Words in Human History (recorded).
In other words, 604 gigabytes is 0.000000000013 times the amount of All Spoken Words in Human History (recorded), and the amount of All Spoken Words in Human History (recorded) is 77,000,000,000 times that amount.
(2003 figures) (assumes 16 Khz, 16-bit mono recording)
Criticizing a 2002 estimate of 5,400,000,000 gigabytes, linguist and University of Pennsylvania professor Mark Liberman asserted that it would actually require 46,000,000,000,000 gigabytes to house a recording of all speech in human history, even at a relatively low level of quality. For the purposes of his calculations, Liberman estimated the total duration of such a project to include 416,390,367 years of continuous audio.