Thanks for posting your billing details. I think there is a misunderstanding about how our coupons work. The coupon was for a total of $55 worth of charges, so this would cover 1 TB of storage and 1 TB of egress (assuming you did not upload a big number of very small files, in which case the object fee charges would not be neglegible). The total $55 credit from this coupon could be used for any usage charges spread out over the first 2 billing periods. You only used up 5.5633 TB-hours out of 720 TB-hours of storage in the first month, and only part of the 1 TB egress, so this was not billed to you for february (no charges appear for february in your Billing history). Please note that the price for egress is $45 per TB and not $30, as you can see on our tardigrade webpage so the estimated charges so far for march for egress are pretty close to what would be expected. However, please note that afaik the current month estimated usage charges do not yet take into account any credits you have still available from the 1 TB coupon for egress. You used about $0.08 for the 5.56 TBh of storage last month, about $0.19 for object fees and $21.51 for egress. So a total of about $21.78 you did not get charged for in February usage. That leaves still $55 - $21.78= $33.22 you can still use to cover any combination of storage, bandwidth and object fees incurred this month. So I expect that you should still could use the remaining balance of the coupon to pay for about 738 GB of your total egress this month. Which means that only 1.2206 TB - 738 GB = 482.6 GB of egress so far this month are billable, which would be about $21.72 for egress so far this month. This assuming that you will also pay full price of $10 per TB for storage this month, plus any object fee (should be small).