When going to look at my email one morning, Thunderbird seemed to have lost all my previous emails, except a random 6, all subfolders were missing and it wasn't downloading any new messages. There seemed no apparent reason for this what so ever, as everything was normal the night before. It is fortunate I have a phone and iPad through which I can access emails, however, attaching or reading some documents isn't always simple on these devices. I tried Googling solutions, but I'm afraid the jargon got the better of me. Data folder, ImapMail, POPs, MSF...no idea what they are or where to find them on my Mac. One said to go to Tools then select Account Settings. There is no such option in my Thunderbird Tools drop down list. My brain is wired for arts and languages, not maths and technology, so this is all most frustrating, therefore I am hoping that someone might be able to help, please!