It is safe and the users can access their Thunderbird files in PST format without any hassle so try professional software Thunderbird to PST Converter. It is the safe and secure tool which can effectively convert MBOX file to PST and another file format such as EML, EMLX, HTML, PDF, MSG and etc. This software has a selective feature that can be used to import items and folders from Thunderbird to PST file.
Steps to export Thunderbird to PST for Free:
Run Mozilla Thunderbird and open the desired mailbox.
Select the emails that you wish to export in the PST file.
Right-click and select the "Save As" option.
Choose the desired folder to store the Thunderbird emails and click on the “Select Folder” option.