If your normal usage is between 200GB and 800GB you can use this to save money!
Month 1 2TB package:
Use 800GB which means you carry over 600GB (half the unused 1.2TB)
Month 2 200GB package:
Starting allowance is 800GB and all is used
Month 3 back to 2TB and keep repeating.
The interesting thing is that it renders the 300GB package totally redundant. Doing as I suggest costs an extra £15 every other month (average £7.50 per month). The 300GB package costs an extra £10 per month!
AAISP November 2016
(Previous ISP Plusnet November 2001 to October 2016) Why I left Plusnet
Telephone rental: Pulse8