how do I to delete unwanted emails from storage folders in windows live mail

I currently have > 20,000 *.eml files hidden away in Windows livemail storage folders and I estimate that ~16,000 *.eml files I will never need.

When I delete an *.eml from my Inbox the *.eml is retained in storage.

Is it possible to adjust settings so that when an *.eml is deleted from my Inbox, it is shred and it is not saved in storage folders.??

When I delete an *.eml from the Inbox, I am sure I will never require to recover it from Storage folders.

I don't have the time (or patience) to go through 20,000  *.eml files and delete the unwanted ones.

I am currently deleting about 25 *.eml files which don't require to be saved in storage folders.

I would appreciate any help I can get to delete the *.eml files that I don't need.

Regards

[Moved from: Windows / Windows 10 / Files, folders, & storage]