This article outlines common mistakes in configuring S3 storage for Delta Lake tables that lead to unnecessary expenses. It provides practical strategies for optimizing storage, managing versioning, and reducing data transfer costs. The focus is on leveraging both Delta Lake and AWS features to improve efficiency.

AWS announced significant price reductions for the Amazon S3 Express One Zone storage class, effective April 10, 2025, including up to 85% off GET request prices and 60% off data upload and retrieval charges. Designed for high-performance workloads, S3 Express One Zone offers faster data access and supports a wide range of applications, enhancing both performance and cost efficiency for users. Customers have already reported improved performance and reduced costs using this storage solution.