A folder is traditionally read as order imposed on what is scattered, the urge to file things away. Its contents point to matters you are keeping closed or have not yet faced.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.