Hi, I've been using Thunderbird for years. I have thousands of emails organized into folders based on at least 8 different email addresses. Today, all the mail from one of the folders disappeared, even though no intervention was made. The restore folder command didn't help either. The size shows 0 kb (it should contain many years of correspondence). I looked in the File explorer in the Profile folder, but both the cur and tmp folders are empty. It's not among the deleted items (of course I didn't delete them, I just checked there). I ran scandisk on the drive, no errors. I searched for email addresses in Thunderbird, it found emails from 2 years ago, but it could not display, it said "cannot be displayed". I have no more ideas. Please help me. Thanks.