A gigabyte was considered to be big enough couple of years back. Now, most of us started using Terabyte drives for backup. According to the latest findings from the Cisco Visual Networking Index (VNI), we’ll need to add the term “zettabyte” to our vocabulary by 2015.
A zettabyte is roughly 1000 exabytes. To place that amount of volume in more practical terms, an exabyte alone has the capacity to hold over 36,000 years worth of HD quality video…or stream the entire Netflix catalog more than 3,000 times. A zettabyte is equivalent to about 250 billion DVDs.