Core concept
Standard: $23/TB/month. Standard-IA: $12.50/TB + retrieval fee. Glacier Instant: $4/TB. Deep Archive: $0.99/TB with 12h retrieval.
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How it works
IA classes have retrieval fees + minimum storage duration. Glacier requires retrieval jobs (except Instant). Model access before choosing.
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Trade-offs + gotchas
Standard: hot data. IA: monthly access. Glacier Instant: quarterly + fast retrieval. Deep Archive: compliance + backup.