Jungle Disk is primarily for computer backup, but does allow some file sharing. Designed to easily and automatically backup your computers and share files between computers. All files are encrypted before leaving the computer.
At the department, school or district level, Jungle Disk can be used to ensure all computers are being backed up on a regular basis, without end users being able to see each others’ files.
This is the service that our webmaster uses to back up everything. A little more technical than other options, but highly recommended.