If the old computer is still available, it should be there. Please provide more information.

Is there a direct line I can call to troubleshoot? Im missing contacts, archives and emails from before May 2023. Ive used Thunderbird for over 10 years and now im only seeing things from the past 2 years. The old computer itself isnt available anymore, but i do still have the hard drive. Everything was supposed to be copied over to my new computer when i logged in.

If the hard drive content was copied to new computer, one of the folders that should be in the root directory of wherever it was copied is named 'users' . From there, look for this set of folders: users\<yourid>\appdata\roaming\thunderbird. That is the folder that was on the old computer. Assuming that it is intact, here is my suggestion: - exit thunderbird - copy the c:\users\<yourid>\appdata\roaming\thunderbird folder to somewhere else. This is just fo safety. - now copy the thunderbird folder from backup (above) to c:\users\<yourid>\appdata\roaming to overwrite the existing Thunderbird folder. - now start thunderbird. if the old profile was intact, you should see what was on old computer.