Which are the factors underlying human information production on a global level? In order
to gain an insight into this question we study a corpus of 252–633 mil. publicly available
data files on the Internet corresponding to an overall storage volume of
284–675 Terabytes. Analyzing the file size distribution for several distinct data types we
find indications that the neuropsychological capacity of the human brain to process and
record information may constitute the dominant limiting factor for the overall growth of
globally stored information, with real-world economic constraints having only a negligible
influence. This supposition draws support from the observation that the files size
distributions follow a power law for data without a time component, like images, and a
log-normal distribution for multimedia files, for which time is a defining qualia.
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