Discover more about what's new at AWS with AWS Lambda functions can now mount Amazon S3 buckets as file systems with S3 Files

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AWS Lambda now supports Amazon S3 Files, allowing Lambda functions to mount S3 buckets as file systems and perform standard file operations without downloading data first. Built on Amazon EFS, S3 Files provides file system simplicity with S3's scalability and durability. Multiple Lambda functions can share the same file system simultaneously, eliminating custom synchronization logic. This is especially useful for AI/ML workloads where agents need to persist memory and share state across pipeline steps. Lambda durable functions complement this by enabling multi-step AI workflows with automatic checkpointing. S3 Files can be configured via the Lambda console, AWS CLI, SDKs, CloudFormation, or SAM, and is available at no additional charge beyond standard Lambda and S3 pricing.