One of the most reliable solutions is eSoftTools IMAP Backup & Migration Software, which seamlessly integrates Zoho Mail into Thunderbird without any data loss. Its interface is designed for users. It allows IMAP backup to Outlook PST from a single folder, and offers users a free demo allowing them to save 25 items from each folder for free. Read more- https://www.esofttools.com/blog/add-zoho-mail-to-thunderbird/