pick and choose option for tasks

Hi

Is there any possibility to select/deselect folders, files before the synchronisation or backup task? If I compare two folders, I see in the preview the differencies and the tasks to be performed. If I f.ex. don't want to have one folder or file copied, I would like to be able to deselect it.

(same option like Puresync offers, which is not available portable)
Thank's