I am desperate. I, perhaps foolishly created a folder with around 200 sub-folders for filing all my correspondence in Thunderbird. I run a busy business and insist on email correspondence. I take clients emails out of the inbox and store them in these files. They are full and go back years. They are my business records. Microsoft specifically told me they would not be lost when they told me I had to reinstall Windows10 to fix an error they made. They said all the files would be still be there, confirming my belief they were on my computer once I took them out of the sent and inbox. I downloaded Thunderbird again, and set up my six email accounts but have no idea if I can retrieve all that history that I stored. I'm holding my breath. Please let me know if its possible. Thank you