Transfer Thunderbird to a New Computer Step by Step
DRS Thunderbird Email Backup Tool provides a practical way to move Thunderbird data to a new computer and create secure backups of mailbox information. It allows users to export Thunderbird emails into multiple formats, including PST, EML, EMLX, MSG, CSV, HTML, MHTML, PDF, TXT, DOC, DOCX, DOCM, PNG, TIFF, JPG, and GIF, as well as migrate emails to services such as Gmail, Yahoo Mail, Office 365, AOL, Hotmail, iCloud, IMAP, and Zoho Mail. The tool includes useful options like selective backup without attachments, mail filtering for organized results, and duplicate email removal to help maintain clean backups. Designed to work on both Windows and macOS systems, it also offers a demo version for evaluation and access to 24/7 technical support for user assistance.
read more - https://www.data-recovery-solutions.com/blog/top-tips-to-move-thunderbird-to-new-computer/
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David son commented
The most popular tool is DataVare Thunderbird Converter, which is what I'd like to recommend for moving Thunderbird to a New Computer. Further, it can convert Thunderbird files to multiple formats, such as PST, MSG, EML, EMLX, HTML, NSF, PDF, TGZ, Office 365, Gmail, and more. It works with all versions of Windows, such as 11, 10, 8, 7, XP, Vista, and more. There is a free test version that you can use to find out more about how it works.
Read More - https://www.datavare.com/converter/thunderbird.html