This article announces that AWS Lambda now supports Amazon S3 Files, enabling Lambda functions to mount S3 buckets as file systems for direct file operations without downloading data.

• Lambda functions can mount S3 buckets as file systems using S3 Files
• Built on Amazon EFS for file system performance with S3 scalability and cost-effectiveness
• Multiple Lambda functions can share data through common workspace simultaneously
• Eliminates need for downloading objects, uploading results, and managing storage limits
• Particularly valuable for AI/ML workloads requiring persistent memory and state sharing
• Works with Lambda durable functions for multi-step AI workflow orchestration
• Configure via Lambda console, AWS CLI, SDKs, CloudFormation, or SAM
• Available in all regions where Lambda and S3 Files exist at no additional charge

S3 Files simplifies stateful Lambda workloads by providing seamless file system access to S3 data, eliminating custom synchronization logic and storage management overhead.