Cost of MWAA part 2 - Storage cost

I want to follow up on https://repost.aws/questions/QUmuAqDG_yT2KCtu7G1zsukQ/cost-of-aws-mwaa. I understand the hourly cost is started once the Environment is established (not per DAG execution) My question is for monthly storage cost - since the local storage (10GB max) is only alive during the life cycle of the worker executing the solid, so I assume worker usage of these 10GB of storage does NOT count toward the monthly storage charge? My 2nd question on storage is - unless we remove previous Airflow DAG execution information in the MWAA environment otherwise this WILL count toward the monthly storage charges, is that correct? Thanks!