Manage the access tier of a blob in an Azure Storage account
Each blob has a default access tier, either hot, cool, or archive. A blob takes on the default access tier of the Azure Storage account where it is created. Blob Storage and GPv2 accounts expose the Access Tier attribute at the account level. This attribute specifies the default access tier for any blob that doesn't have it explicitly set at the object level. For objects with the tier set at the object level, the account tier won't apply. The archive tier can be applied only at the object level. You can switch between access tiers at any time by following the steps below.
Change the tier of a blob in a GPv2 or Blob Storage account
The following scenarios use the Azure portal or PowerShell:
Sign in to the Azure portal.
In the Azure portal, search for and select All Resources.
Select your storage account.
Select your container and then select your blob.
In the Blob properties, select Change tier.
Select the Hot, Cool, or Archive access tier. If your blob is currently in archive and you want to rehydrate to an online tier, you may also select a Rehydrate Priority of Standard or High.
Select Save at the bottom.