How much data is created daily (source of IBM estimation) 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.
The McKinsey Global Institute published an interesting report on the topic of Big Data.
You can find it here.

I don’t know where IBM go the numbers from, but this report is a good source.