This document discusses the history of data storage, from the first commercial disk drive in 1956 holding 3.75 MB to modern storage arrays like the NetApp AFF 8000 which can store 4.6 PB. It shows how the cost per gigabyte has declined dramatically over time, from $686 per GB in 1980 to just $0.03 per GB in 2015. Various milestones are highlighted such as the first 1TB hard drive in 2007 and first 1TB SSD in 2010, showcasing how storage capacity has increased significantly according to Kryder's Law.