An Azure service that is used to provision Windows and Linux virtual machines.
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If you are looking for low cost solutions, standard_LRS would be the suitable option. However, redundancy options in LRS are less compared to other replication type. For better redundancy - you can prefer GRS/RA-GRS.
Please refer : Azure Storage redundancy
Please, go-through the storage pricing calculator for better understanding on pricing details.
Please refer the link for more details on Azure Storage for SQL Server backup and restore
Hope this helps!
Kindly let us know if the above helps or you need further assistance on this issue.
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