On the 27th August 2014, Dropbox announced that the Dropbox Pro plan now comes with 1TB (1,000 GB) of storage for US$9.99/month (S$13/month) or you can pay upfront for the year and that will cost you US$99/year (S$125/year).
Previously, US$9.90/month will only give you 100GB of storage, while 200GB will cost you US$19.99/month and 500GB will cost you US$49.99.