https://www.google.com.au/#newwindow=1&q=cloud+storage+pricing
http://www.businessinsider.com.au/best-cloud-storage-price-google-drive-dropbox-icloud-one-drive-2014-12
http://www.cloudwards.net/comparison/
https://virtualizationreview.com/articles/2015/03/31/amazon-cuts-cloud-storage-prices-to-nearly-nothing.aspx