Hi everyone, I would like to migrate from Outlook 2011 to Mozilla Thunderbird, but know that in the past Thunderbird used to store all emails in one large database. This obviously is not a good situation for Time Machine, because a single email will result in the entire database being backed up every hour. Since I currently have over 57000 emails that must be preserved the database file will be huge. Long ago I read that the developers of Thunderbird was planning on creating a "one file per email" kind of storage system that will allow Time Machine to incrementally backup the latest email messages and not the entire database every single time. I cannot find any info on whether this was implemented or not, so my question is: Can a Thunderbird user please check how emails are stored and let me know if it's a single database or multiple files?