I've stumbled upon this IBM text.
It states that:
Every day, we create 2.5 quintillion bytes of data
It's very interesting statistic, but I couldn't find any source for this.
Does anyone know how they calculated this? Or maybe someone knows some papers showing similar/different results?
This paper from CSA has the same statistic, but again without any source.
Note: The quote from IBM's text refers to data created by humanity, not by IBM alone.