My folders just disappeared. Terrible. Lots of stuff including emails from my son going back years. I'll have to resubscribe to online events.
What to do? I know about Hide Folders. There's Folders -- nothing in it.
Ok, I went into Trash to recover everything. When I went to move -- all my folders came up. I moved them to Inbox, and they magically reappeared. It's either helpful or probably not. dunno..