Annual: Prepay for the year and get two months free. You get access to the entire annual quota at once with no monthly limits. Quota refreshes annually upon renewal.
Annual-Paid-Monthly: Just like the annual billing, this option provides access to the entire annual quota at once with an annual commitment. There are no monthly upload limits. The account is billed monthly at the monthly billing price. Cancellation fees are only applied if usage is over the monthly average. For example, if you used 50% of your quota in 6 months, there would be no cancellation fee. However, if you used 50% in just 2 months, you would be charged for an additional 4 months.