To see a binder in your dream, suggests that you are trying to stay on top of things and not fall behind in your work or obligations.
If you dream of looking through someone else’s binder, this indicates your mistrust of others and your tendencies to be in everyone’s business and affairs. Perhaps you have recently stumbled upon some information that was not meant for your eyes.... My Dream Interpretation
(Bookbinding) A bookbinder in a dream represents an undertaker, or a tailor. In a dream, bookbinding also may mean concealing secrets and guarding one’s friendship, or it could mean affection one reserves for a dear person.... Islamic Dream Interpretation