Moving Thunderbird Data from Linux to Windows 10

Backup your profile on the Linux computer. https://support.mozilla.org/en-US/kb/profiles-where-thunderbird-stores-user-data#w_backing-up-a-profile Restore the profile on the Win 10 computer. https://support.mozilla.org/kb/profiles-where-thunderbird-stores-user-data#w_restoring-a-profile-backup More info about profile location: http://kb.mozillazine.org/Profile_folder_-_Thunderbird Note: When moving profiles between dissimilar operating systems the syntax is incompatible and may break the absolute version of a path. For example, Linux has no concept of a drive C:. Normally this is harmless since Thunderbird prefers to use the relative version. However, if this causes a problem (most of the folders for an account aren't visible, and your inbox looks empty) find the local directory setting at the bottom of the Account Settings page, and use the "Browse" button to update its location. Normally it points to a directory named after the mail server used by that account, unless you using a global inbox. In that case it points to the Local Folders directory in the profile.