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Each data disk can be up to 32,767 GiB. The number of data disks you can use depends on the size of the virtual machine. For details, see Sizes for Virtual Machines.
Azure Managed Disks are the recommended disk storage offerings for use with Azure Virtual Machines for persistent storage of data. You can use multiple Managed Disks with each Virtual Machine. Managed Disks offer two types of durable storage options: Premium and Standard Managed Disks. For pricing information, see Managed Disks Pricing.
Azure storage accounts can also provide storage for the operating system disk and any data disks. Each disk is a .vhd file stored as a page blob. For pricing details, see Storage Pricing Details.