Under Steeings/General/Usage, my email shows 2.1Gb used, but after deleting old emails from Inbox, and Sent folder, and Deleted folder, (cutting sum total of emails by about 80%) the usage still shows 2.1Gb used.
Next largest is Messages (saved) currently showing 389Mb used. I deleted ALL messages, and the number will not decrease.
Question: How to reduce these numbers. I have searched many threads, and tried many suggestions. Nothing seems to work.