i cannt copy any files in my pendrive?

I bought IBM 8 GB pendrive from china boarder, but the problem is that if i copy anything just by copy paste or drag n drop it will work fine but when i copy the file by creating a new folder n pasteing it inside that folder, later when we open it in another computer the folder will be empty or displayed empty, pls email me in my email address: kumarneupane@gmail.com