The best and easy way to import PST to Thunderbird is by opting Advik PST Converter. As you all know Mozilla Thunderbird doesn't offer any feature to import PST file. Thus, you can choose Advik PST Converter tool to execute this task.
With this program, you will be able to open PST file in Thunderbird with complete emails and attachments.
Download and Try for FREE: https://www.adviksoft.com/pst/convert...
Steps to Import PST to Thunderbird are as follows;
1. Run Advik PST Converter in your Windows PC.
2. Click Add File and load .pst file into software.
3. Select email folders to export into Thunderbird.
4. In saving option select Mozilla Thunderbird.
5. Click Convert button.
Done! The software will export entire data from Outlook PST file into Thunderbird in no time. You can batch import .pst to Thunderbird using this software to avoid manual efforts and time consumption.