Complete guide to Azure Blob Storage: block/append/page blobs, the 4-tier model (Cold tier included), cost traps, Archive rehydration, and security best practices.
Azure Blob Storage Explained: Complete Beginner-to-Advanced Guide Complete Guide Blob Storage Access Tiers Cost & Security Azure Blob Storage Explained: Complete Beginner-to-Advanced Guide Most explanations of Blob Storage stop at "Hot, Cool, and Archive" — a three-tier model that's been out of date since 2023. A fourth tier sits between Cool and Archive, and the actual cost traps that catch teams aren't in choosing the wrong tier — they're in the specific minimum-duration and minimum-billable-size rules almost nobody reads until the bill arrives. Two things worth knowing before anything else There are four access tiers, not three. Cold tier, added in 2023, sits between Cool and Archive — a lot of still-circulating content only covers the original Hot/Cool/Archive model. Moving or deleting a blob before its tier's minimum storage duration triggers a prorated early-...