How to sync only few subfolders in one big folder?

[sicro]

You might want to have a look at this discussion:

Opposite of .stignore - feature request?

I need something like the opposite of a .stignore file, I have a directory in which there are just a few files I want to synchronise, it would be a real chore to add all the files I don’t want to synchronise to .stignore. Also, when I add a new file to the directory, I don’t usually want it to be synchronised. Using .stignore the default is that any new file will be synchronised, I want the opposite. Is this a reasonable feature request?