can you provide a bit more info before you do anything. I'm presuming this is a pop mail account - please confirm. First, make sure hidden files and folders are visible: The AppData folder is folder is a hidden folder; to show hidden folders, open a Windows Explorer window and choose "Organize → Folder and Search Options → Folder Options → View (tab) → Show hidden files and folders". * Help > Troubleshooting Information * click on 'show folder' button * click on 'Mail' folder. * Please post image of the contents of the 'Mail' folder. In thunderbird: * right click on mail account name and select 'Settings' * Select 'Server Settings' for the mail account * Look bottom right for 'Local directory'. * Put mouse cursor in the text box, then use keyboard arrow keys to navigate to the far right..some of the directory will be hidden as it does not fit it all in, so keep going to the right until you reach the end. * Then left click, hold down and move mouse to the left to highlight the entire entry. * Right click on highlighted area and select Copy. * Paste info into this question in the forum.