I believe you want to share your uploaded file with a friend? You can do so by clicking on the file in your file view, then clicking on the 'share' icon on the upper right just below the file name(second icon from the left, the box with the arrow pointing right). Click the slider to the left so it shows as 'public' (its not truly public...only the folks you share the URL with will be able to view your file). Then you can either enter in your friends email address in the box below or copy the URL and send it separately.
Please let me know if you have any other questions.