If in a dream you put documents in the folder, then in real life you were tired of the chaos reigning around. If dreamed you that you lost the folder with documents, then in reality you are not sure that you will be able to justify the confidence. A dream in which you cannot find documents which have to be there in the folder you should be ready to deception and disappointment.
Be sure and keep any other thoughts out of your mind before drifting to sleep as a cluttered mind can decrease the chances that you will remember your dreams upon waking. Also, focusing on remembering your dreams upon waking in the morning is another very important thing. This sounds very easy, but is often hard for some to do. Interpret a dream by "dictionary dream of interpretation"
When you very first wake up, simply think about your dreams. Don't allow your mind to drift off to other things, just lay there and think about the things you dreamt about the night before - dictionary dream meaning.