Die Idee ist gut... Rated 3 out of 5 stars

Using TB 10 / 11
Some times (!) it makes a copy, but not all of the subfolders, have to repeat same action (from - to) often; counting of mails in the subfolders is correct... and yes, I have the mails locally for offline-reading.

This review is for a previous version of the add-on (1.2).