Difference between new and classic storage accounts in Azure

Question

Azure has Storage accounts and Storage accounts (classic) in the Azure Portal.

What are the differences between them? Is there any reason to migrate from a classic storage account to a new storage account?

Answer 1

Classic storage accounts are created using existing Service Management API's (the REST API stack that's been available for the past several years). The newer storage accounts are created with the new Azure Resource Manager (ARM) API's (which are also wrapped in PowerShell and CLI now). Ultimately they provide the same resources to your apps, but they're created/managed differently, and there are a few nuanced differences (such as the ability to tag resources that are created via ARM scripts).

You can't convert a classic storage account (or any classic resource) to a newer type. You don't really need to anyway, unless you're trying to mix resources from classic and new, such as adding ARM-based virtual machines to a classic-based virtual network, or spin up an ARM-based VM from a vhd image sitting in a classic storage account (and for that example, you could always just copy the vhd to a new storage account). Note that, for general storage usage (blobs/tables/queues), you just need the URI and the primary (or secondary) key. With those, you can access your storage resources from anywhere, from any VM/website/etc, regardless if you're accessing storage from classic or new virtual machines, for example.

Check out this link for a general list of differences between classic and new resources.