Your company wants to configure a storage account.
You need to ensure that the storage is available in case of failure of an entire datacenter. You also need to move the data to different access tiers depending on the frequency of access. Your solution needs to be the most cost-effective.
What type of storage should you configure?
You should configure a storage account with ZRS replication. This type of replication makes a synchronous copy of the data between three different availability zones in the same region. Each availability zone is autonomous from the others and has separate networking and utility features. Because you also need to be able to move data between different access tiers based on the data access frequency, you need to configure a General Purpose v2 storage account. This is the most cost-effective solution.
You should not configure the storage account with LRS replication. This type of replication makes a copy of the data between different storage scale units inside the same datacenter. This type of replication is not resilient to a datacenter failure.
You should not configure the storage account with GRS or RA-GRS. This type of replication makes your data available in case of a datacenter or regional failure. This type of replication makes your data resilient to a datacenter failure but is not the most cost-effective solution.