– First of all open the home folder

– Then Press the ctrl+h to open hidden folder

– You will found the .thunderbird folder

– Open that folder , inside that you will found
– Crash reports folder
– another folder with with .default extension

– open that folder and copy all data

– save that data at safe place and whenever in other pc it required
open the same .default folder in that PC and paste that data.

– Restart the thunderbird , it will show all your mails which are in another PC

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