Students can NOT send files to other student users. Teachers, Admins, and Super Users are able to submit files to students. A student may only submit a file or turn in work to a staff member.
However, a group can be created in eBackpack to support student -to- student sharing. In this case, the Super User has to turn on the option to allow Member File Sharing for classes/groups (green folders). Additionally, the class administrator (a staff member) must turn on the option to allow Member File Sharing at the class/group level. This allows members of the group to collaborate on a project together within the materials sections. The teacher will still have full visibility of all files being shared among students in the class.