![]() At 1,200 petabytes, these four companies hold enough data for 400 trillion songs or 2.2 billion years of audio. To put this number in perspective, a three-minute song uses about 3 megabytes of data. That’s equivalent to 1.2 million terabytes or 1.2 billion gigabytes. Researchers estimate that all the data held by Google, Microsoft, Facebook, and Amazon totals 1200 petabytes.
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