Hi, I am Jeronimo, Thanks for reaching out! I'm an Independent Advisor and a Microsoft user like you.
Currently, Outlook (formerly Hotmail) and OneDrive share the same 5 GB of cloud storage. If a large portion of that storage is used by OneDrive, you won’t be able to receive new emails—even if your email usage is minimal—until you either free up space or upgrade your storage by subscribing to one of the available plans.