The sharing of content without login to MyStorBox has been extended. Now you can adjust the permissions on the shared folder. The following three options are available:

• Download
  The contents of the shared folder can be viewed, downloaded and played back
• Upload
  The contents of the shared folder remain invisible to friends.
  However, friends can upload files and folders.
• Upload & Download
  The contents of the shared folder can be viewed, downloaded and played.
  Files and folders can be uploaded.

You can find more information here.