For exporting Thunderbird database to Gmail, select Gmail from Select Output Type options. Click Next button to continue
Now, enable the option of Apply Rules/Filters and click on the Set Filters if you need to export specified Thunderbird mailboxes to Gmail.
After then apply advance filters according to Date, From, To, CC, BCC, and Subject. Then click on the Apply.
Then, provide login details of your G Suite account and hit on the Export to start the export Thunderbird to Gmail process.
Now, the tool will start the conversion process of Thunderbird to Gmail. The export process will open every detail about the conversion such as current file progress, item count, and status, file size, etc.
Once the tool done with the process, it will open an alter window showing successful completion of conversion procedure. Hit on the OK to complete the procedure.
On clicking OK button, the software will enable two buttons OK and Save Report. If you want to exit the application, click OK. If you want the complete conversion progress report, hit Save Report button, which will save the detail of processing in CSV file as a record.
A new window will open showing the message of successful saving of conversion report. Click OK button to finally finish the process and exit the application.
Navigate to the folder location of your resultant files and click on the .csv file to open and access the conversion report.
Finally, view all the uploaded Thunderbird files in Gmail Account.