about the black file i use to bring

That slightly bigger than A3 size paper file was the file that the invention design class needed all of us to make and put in all documents and paper work for the invention design project.But sometimes i put in my art project paper work too is just ease for me to bring and do any of the projects whenever i like.Because of inserting the art project paper work into it,sometimes my art paper work was accidentally saw by my invention design teacher.Haha.