Hola Pazos,
Thanks a lot for explanation. For me also it looks it's something with CC,
as in my understanding would there be occuring any issue with guessing the path,
then it should be never working ...
Meanwhile, I have installed Calibre Sync as per recommendation from another user in the CC forum, and there everything works like a charm ! And it has for me somehow more logical UI ... will start with it so am not interested anymore in CC