I'm regularly updating a folder called The Netherlands with new photographs on the same subject. Say it contains Dutch highlights. After the initial photo shoot (windmills) I updated this folder for several times (Amsterdam and Rotterdam) it now consists of over a thousand photographs. I made a smart collection of that folder and it synchronised perfectly on my iPad. But much to my annoyance I did not manage to synchronise with my iPad without deleting this smart collection every time after updating the folder with new photographs and rebuilding it as an smart collection and uploading its content all over again. It takes a lot of time. What do I do wrong?