Amazon Glacier is specifically designed for data archiving and long-term backup. It provides:

• Secure, durable, and low-cost cloud storage for data archiving
• 99.999999999% durability (eleven 9's)
• Comprehensive security and compliance capabilities to meet stringent regulatory requirements
• Optimized for infrequently accessed data at the lowest cost

Comparison with other options:

• Amazon Storage Gateway: Hybrid cloud storage service, not specifically for archiving
• Amazon EBS: Block storage for EC2 instances, designed for frequently accessed data
• Amazon S3: Object storage for general purpose, while S3 Glacier is the archival tier of S3

Amazon Glacier is the dedicated archival storage service in AWS, making it the best choice for archive data storage.