Download the Transfer Outlook PST File to Thunderbird which can help you to converts multiple Outlook files to Thunderbird with attachments without losing any data. The tool is simple to operate but supports advance features. The utility retains data quality. The tool preserves hierarchy of the content. It doesnt make any change in text & content structure. There is no file size limitation, you can convert number of files at a time without any problem. This software supports batch conversion option during conversion process.The software is compatible with all Windows OS including latest Windows 11.