Synchronizing both was done correctly. However, I moved 2 messages to one of the folders under 'local folders'. They can not be found in it. Well another message that I, as far as I know, not moved ?? Also went searching if they might be under a different folder in 'local folders'. Waited until now to respond because this may only be changed once a day, but that did not help either. Moving and backing up messages to keep is not reliable?

Everything succeeded: but no good result. Sorry. On the contrary: transferred a mail in the old laptop to local folders and I find it there. OK But in the new laptop I can not find that same mail anywhere! Can look it up and he will appear in the lookup list. But he can be seen in the mailing list anymore; can not be found in the local folders anymore and can't be deleted in the lookup list also!. He appears to be floating somewhere?

I have the "transfer" problem every time my Win7 computer gets hacked with a terrorist blackmail shutdown. So every night I back up the relevant TBird files to an offline storage device so that they can be restored. The *location* in Win7 is "C:\Users\rs\Application Data\Thunderbird\Profiles\GOBBLE.default\Mail" where "GOBBLE" Is the actual default folder on your computer which you can locate by stepping down through its preceeding folders in my example. When I need to restore from the offline storage device, I simply copy it over the full system restoration that I had to do (from its weekly full system backup) to regain control of my hacked physical computer.

The problem still remains unsolved: the local folders of the new laptop were to be placed in the cloud with the intention of creating a synchronized version in the older laptop: it did not work either. Moved mails to the local folder remain absent while, of course, those mails can no longer be seen in IMAP.