I have create a dev resource group for databricks which includes "storage account", "access connector" and "databricks workspace". In the storage account I have created a container which is linked to the metastore. This container also contain raw data. In unity catalog enabled databricks workspace, I have create "bronze", "silver" and "gold" schema which is stored externally as well in the same container. Now, I want to create volume to access "raw" data. My question is, does it make sense to create "external" volume in this case?