WILL NOT DELETE OLD MSG
The messages could not be moved or copied to folder 'Trash on jmor444@gmail.com' because writing to folder failed. To gain disk space, from the File menu, first choose Empty Trash, and then choose Compact Folders, and then try again.
ప్రత్యుత్తరాలన్నీ (2)
And did you?
I had the same problem. The instructions under "You're Unable to Delete Messages" on the site https://www.getmailbird.com/thunderbird-email-problems/ worked for me. I.e. just stop thunderbird, delete the Trash.msf and Trash folders and restart thunderbird.
In Linux they are found in /home/<user>/.thunderbird/*******.default/Mail/<mail account>/