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 one: 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? Choose all that apply:
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 failure of a single data center or region, but it protects you from hardware failures.
Premium storage supports only locally redundant storage (LRS).
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.