Use an Azure Storage Account to exchange change management files between your D365 FO environment and other environments.
You can:

• Create an Azure Storage Account.
• Use the Azure Storage Account of your D365 FO environment. If a cloud-hosted D365 FO environment is created with LCS, automatically the related Azure Storage Account is created. The default name of this Azure Storage Account is the same as the D365 FO environment name. Note: When you delete the D365 FO environment, the related Azure Storage Account is also deleted.

For more information, refer to Create an Azure Storage Account.