Local Folders and Entire Sub-Folder Structure Disappeared.

All my local mail folders disappeared. I had dozens of folders and sub-folders under local folders. Yesterday I created rules on all my incoming email - had all past emails filed, and tonight opened em client and not a single folder was present - in fact there was no Local Folders at all. Anybody know what happened? These emails contain important reference information and I can’t afford to lose them.

Egg on this new user’s face!!! Embarrassment is excruciating! I unknowingly changed a setting that resulted in hiding the local folder. Operator error I’m afraid.