You are determining which type of Azure storage replication is appropriate for your storage account.
You must consider the features of each replication option and choose the most appropriate which is the most appropriate: locally-redundant storage (LRS), zone-redundant storage (ZRS), geo-redundant storage (GRS), or read-access geo-redundant storage (RA-GRS).
Which replication options should you use to provide the features listed in the answer area?
LRS maintains three copies of your data within a single datacenter in a single region. This type of replication does not protect your data from the failure of a single data center or region, but it protects you from hardware failures.
Premium storage supports only LRS as storage redundancy.
RA-GRS replicates your data to another datacenter in a secondary region and provides read-only access to the data in the secondary location. This replication option is the default option for new storage accounts.