Geo-redundant storage

Geo-redundant storage (GRS) replicates data not only within the same region, but also in other regions. Firstly, it makes three copies of the data within the same region synchronously, and then it makes another three copies of data in other regions asynchronously.

Drawbacks

• If a disaster occurs, some data might be lost, because the data replicates to the other regions asynchronously
• If a disaster occurs, there will be some delay in accessing your data until Microsoft initiates a failover to the secondary region

Advantages

• It provides the highest durability and availability, even if a disaster occurs in an entire region.
• Unlike ZRS, if the original source of data faces an outage, there will be no possibility of data loss if the other three copies that exist within the same region don't face an outage too, as it replicates synchronously within the same region.