What you can do is on the Web on the subject, (great solution tell) what I mean is that the folder itself can not be protected even if for example you are the sole administrator of the team and obviously the rest of users have limited accounts can not access the folder of an administrator. Look for topics such as data or encrypt folders or protect, you must give to the task of looking for software of this type, to give you an example there is a software called "folder guard" that has this feature what happens is you get a months.