This article explains how AWS S3 billing works and why it matters. It breaks down the main costs: storage classes, requests, data transfer, management, and extra features. I learned that choosing the right storage class and using tools like lifecycle policies or Intelligent-Tiering can save money. The guide also shows how to use the AWS Pricing Calculator and offers tips to avoid surprise bills, like watching usage and automating data moves. I found this article very helpful and easy to follow. It’s a great resource for anyone who wants to control their S3 costs and avoid mistakes.