Add a user as Collaborator to all the Parent Folder

Hi

I have a new user added to box, now I want to add that user as Collaborator to all the Folders in “All Files” means the user will have access to all the content on Box. So, How add a user as Collaborator to all parent folder. 

I know the manual step, one by one, but is there any one multiple select option, please explain with images.