I'm trying Amazon AWS EC2 Free Tier. I have a 30GB (Free Tier) EBS (SSD) volume. I am registered at the end of October 2017 at Amazon AWS, in the "Billing" panel I used 3.8 GB of Volume EBS in October and 4.5 GB of EBS Volume in November (Month-to-date usage) The sum is about 9.5 GB. Why in "Forecasted month-end use" is it written that I consumed 22.5 GB? Where are 13 GB (22.5 - 9.5)?
How does Amazon calculate the consumption of my EBS Volume? In November I held the instance and volume off. Why does it say I've consumed 4.5 GB?