Upgrade to a general-purpose v2 storage account

General-purpose v2 storage accounts support the latest Azure Storage features and incorporate all the functionality of general-purpose v1 and blob storage accounts. General-purpose v2 accounts are recommended for most storage scenarios. General-purpose v2 accounts deliver the lowest per-gigabyte capacity prices for Azure Storage. General-purpose v2 accounts support default account access tiers of hot or cool and blob level tiering between hot, cool, cold, or archive.

Upgrading to a general-purpose v2 storage account from your general-purpose v1 or blob storage accounts is straightforward. You can upgrade by using the Azure portal, PowerShell, or Azure CLI. There's no downtime or risk of data loss associated with upgrading to a general-purpose v2 storage account. The account upgrade happens via a simple Azure Resource Manager operation that changes the account type. GPv2 incorporates all GPv1 functionality, so existing applications and tools continue to work without changes after the upgrade.

Important

Microsoft will retire general-purpose v1 storage accounts on October 13, 2026, with new account creation blocked in Q1 2026. All general-purpose v1 (GPv1) accounts must be upgraded to general-purpose v2 (GPv2) by this date to avoid service disruption. If you don't migrate your general-purpose v1 storage account to GPv2 by October 2026, Azure will automatically migrate all existing general-purpose v1 accounts to a GPv2 account, which might result in higher billing costs. Your decision not to migrate an existing general-purpose v1 account will be construed as consent for Microsoft to migrate the account on your behalf. For more information, see GPv1 storage account retirement overview.

If you have a general-purpose v1 storage account, you can upgrade it to a general-purpose v2 storage account, but you can't downgrade it back to a general-purpose v1 storage account. If you have a Blob storage account, you can upgrade it to a general-purpose v2 storage account, but you can't downgrade it back to a blob storage account.

Billing impact of upgrading

Upgrading from GPv1 to GPv2 might result in higher transactional costs, especially for workloads with high numbers of read and write operations. While GPv2 offers lower storage costs and tiering flexibility, transactional pricing is more granular and can significantly affect billing. Review your current usage patterns and estimate costs before upgrading.

Tip

Use the Azure Pricing Calculator to estimate the costs of a general-purpose v2 storage account based on your current usage patterns.

Upgrade an account

To upgrade a general-purpose v1 or blob storage account to a general-purpose v2 account, use Azure portal, PowerShell, or Azure CLI.

  1. Sign in to the Azure portal.
  2. Go to your storage account.
  3. In the Settings section, select Configuration.
  4. Under Account kind, select Upgrade.
  5. Under Confirm upgrade, enter the name of your account.
  6. Select Upgrade at the bottom of the page.

Specify an access tier for blob data

General-purpose v2 accounts support all Azure storage services and data objects, but access tiers are available only to block blobs within Blob storage. When you upgrade to a general-purpose v2 storage account, you can specify a default account access tier of hot or cool, which indicates the default tier your blob data is uploaded as if the individual blob access tier parameter isn't specified.

Blob access tiers enable you to choose the most cost-effective storage based on your anticipated usage patterns. Block blobs can be stored in a hot, cool, or archive tier. For more information on access tiers, see Azure blob storage: hot, cool, and archive storage tiers.

By default, a new storage account is created in the hot access tier, and a general-purpose v1 storage account can be upgraded to either the hot or cool account tier. If an account access tier isn't specified on upgrade, it is upgraded to hot by default. If you're exploring which access tier to use for your upgrade, consider your current data usage scenario. There are two typical user scenarios for migrating to a general-purpose v2 account:

  • You have an existing general-purpose v1 storage account and want to evaluate an upgrade to a general-purpose v2 storage account, with the right storage access tier for blob data.
  • You have decided to use a general-purpose v2 storage account or already have one and want to evaluate whether you should use the hot or cool storage access tier for blob data.

In both cases, the first priority is to estimate the cost of storing, accessing, and operating on your data stored in a general-purpose v2 storage account and compare that against your current costs.

Pricing and billing

Upgrading a v1 storage account to a general-purpose v2 account is free. You can specify the desired account tier during the upgrade process. If you don't specify an account tier during upgrade, the default account tier of the upgraded account is Hot. However, changing the storage access tier after the upgrade might affect your bill, so specify the new account tier during upgrade.

All storage accounts use a pricing model for blob storage based on the tier of each blob. When you use a storage account, the following billing considerations apply:

  • Storage costs: In addition to the amount of data stored, the cost of storing data varies depending on the storage access tier. The per-gigabyte cost decreases as the tier gets cooler.

  • Data access costs: Data access charges increase as the tier gets cooler. For data in the cool and archive storage access tiers, you're charged a per-gigabyte data access charge for reads.

  • Transaction costs: There's a per-transaction charge for all tiers that increases as the tier gets cooler.

  • Geo-replication data transfer costs: This charge applies only to accounts with geo-replication configured, including GRS and RA-GRS. Geo-replication data transfer incurs a per-gigabyte charge.

  • Outbound data transfer costs: Outbound data transfers (data that is transferred out of an Azure region) incur billing for bandwidth usage on a per-gigabyte basis, consistent with general-purpose storage accounts.

  • Changing the storage access tier: Changing the account storage access tier from cool to hot incurs a charge equal to reading all the data existing in the storage account. However, changing the account access tier from hot to cool incurs a charge equal to writing all the data into the cool tier (GPv2 accounts only).

Note

For more information on the pricing model for storage accounts, see Azure Storage Pricing page. For more information on outbound data transfer charges, see Data Transfers Pricing Details page.

Estimate costs for your current usage patterns

To estimate the cost of storing and accessing blob data in a general-purpose v2 storage account in a particular tier, evaluate your existing usage pattern or approximate your expected usage pattern. In general, you want to know:

  • Your Blob storage consumption, in gigabytes, including:

    • How much data are you storing in the storage account?
    • How does the data volume change on a monthly basis? Does new data constantly replace old data?

  • The primary access pattern for your Blob storage data, including:

    • How much data are you reading from and writing to the storage account?
    • How many read operations versus write operations occur on the data in the storage account?

To decide on the best access tier for your needs, it can be helpful to determine your blob data capacity and how you're using that data. You can best understand this by looking at the monitoring metrics for your account.

Monitoring existing storage accounts

To monitor your existing storage accounts and gather this data, use storage metrics in Azure Monitor. Azure Monitor stores metrics that include aggregated transaction statistics and capacity data about requests to the storage service. Azure Storage sends metric data to the Azure Monitor back end. Azure Monitor provides a unified monitoring experience that includes data from the Azure portal and data that is ingested. For more information, see any of these articles:

To estimate the data access costs for Blob storage accounts, you need to break down the transactions into two groups.

  • Estimate the amount of data retrieved from the storage account by looking at the sum of the Egress metric for primarily the GetBlob and CopyBlob operations.

  • Estimate the amount of data written to the storage account by looking at the sum of Ingress metrics for primarily the PutBlob, PutBlock, CopyBlob, and AppendBlock operations.

To determine the price of each operation against the blob storage service, see Map each REST operation to a price.

You can also calculate the cost of geo-replication data transfer for Blob storage accounts by using the estimate for the amount of data written when using a GRS or RA-GRS storage account.

Note

For a more detailed example about calculating the costs for using the hot or cool storage access tier, take a look at the Azure Storage Pricing Page.

Next steps

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