Download by buying a subscription.
You can choose the amount of calendar days and quota per day in GB (Minimum price: 10.00$).
The price is calculated by multiplying the days with the quota.
Price per GB is 0.20$.
With a subscription you can download the desired quota per calendar day at full speed.
Unused quota accumulates.
You can always use your subscription one day longer than chosen, but the extra day doesn't add new quota.
You need to remember your subscription id.
Subscriptions are not recurring.