Azure Storage Geo-Zone-Redundant Replication

The main redundancy options form a spectrum from least to most protective:

• Locally Redundant Storage (LRS): The lowest-cost option. It stores three copies within one datacenter, protecting only against local hardware failures.
• Zone-Redundant Storage (ZRS): Stores copies across three availability zones in one region, protecting against a datacenter failure.
• Geo-Redundant Storage (GRS): Adds asynchronous replication to a secondary region for protection against regional disasters.
• Read-Access Geo-Redundant Storage (RA-GRS): Like GRS but allows read access from the secondary region during an outage.
• Geo-Zone-Redundant Storage (GZRS) and RA-GZRS: Combine ZRS in the primary region with geo-replication, offering the highest level of protection.