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S3 Storage Classes Cheat Sheet
Pick the cheapest S3 class that meets the access and retrieval needs.
- Standard: frequent access, millisecond.
- Intelligent-Tiering: unknown/changing access, auto-tiering.
- Standard-IA / One Zone-IA: infrequent access, millisecond, retrieval fee.
- Glacier Flexible Retrieval: archive, minutes to hours.
- Glacier Deep Archive: cheapest, 12+ hour retrieval.
Exam tip: match retrieval time tolerance to the class; add lifecycle rules to transition automatically.