AWS Transfer Family: How to Choose Between Amazon S3 and Amazon EFS for File Transfers


AWS Transfer Family provides a fully managed, secure, and scalable solution for transferring files directly into and out of Amazon S3 or Amazon EFS using SFTP, FTPS, or FTP. When deciding which storage option to use—Amazon S3 or Amazon EFS—it’s essential to evaluate the requirements of the application or workflow to ensure optimal performance, cost-efficiency, and integration.

Amazon S3: Object Storage for Scalability and Durability

Amazon S3 (Simple Storage Service) is ideal for workloads that involve storing large volumes of unstructured data, such as backups, logs, data lakes, and media files. It offers industry-leading scalability, 99.999999999% (11 9's) durability, and integration with a wide range of AWS analytics and machine learning services.

Use Cases for Amazon S3:

  • Data archiving and backups

  • Media content distribution

  • Application data lakes

  • Analytics and machine learning storage

  • Static web hosting and software distribution

Advantages:

  • Virtually unlimited scalability

  • High durability and availability

  • Cost-effective storage tiers

  • Strong integration with AWS services

Amazon EFS: File System Storage for Low-Latency Access

Amazon EFS (Elastic File System) provides scalable, elastic, NFS-based file storage designed for Linux workloads and is suitable for applications that require shared access to a file system with low-latency reads and writes.

Use Cases for Amazon EFS:

  • Home directories and user files

  • Application hosting and development environments

  • Big data analytics and content management systems

  • Web serving and content repositories

  • Media processing workflows

Advantages:

  • File-level access with POSIX compliance

  • Scales automatically to petabytes

  • Seamless integration with EC2 and container-based services

  • Low-latency performance for I/O-intensive workloads

Choosing the Right Storage for AWS Transfer Family

To determine the right storage type for use with AWS Transfer Family, consider the following criteria:


Criteria

Amazon S3

Amazon EFS

Access Pattern

Object-based

File-based

Data Structure

Unstructured files

Hierarchical file systems

Performance

Optimized for throughput

Optimized for low-latency access

Use Case Example

Data lake ingestion via SFTP

Application file sharing via FTP

Cost

Lower for infrequent access

Higher for consistent low latency


Organizations that need scalable object storage for analytics, backups, or distribution should consider Amazon S3. In contrast, those requiring shared file access, POSIX compliance, and high-performance throughput for applications should choose Amazon EFS.

Both options integrate seamlessly with AWS Transfer Family, enabling secure and managed file transfers tailored to unique business needs.

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