Global data storage is expected to grow exponentially from 0.8ZB in 2015 to 194ZB by 2020 according to the document. The document also outlines Digital Realty's partnership with AT&T to provide colocation services through a combined solution utilizing Digital Realty's data center capacity and AT&T's global connectivity and network expertise. Finally, the document notes several factors that contributed to Digital Realty's revenue growth between 4Q15 and 4Q16 including non-core property sales, higher net operating income, the timing of expenses, and the exercise of equity awards.