1. If they use Google Suite or the schools Shared Network Storage (and possibly myportfolio http://myportfolio.school.nz/ ) then the school has an obligation to instruct students on using these facilities, be able to recover passwords, and if required and feasible recover lost files.
2. If students using their own devices store video, images or other local media e.g cellphone memory card(or even a USB), it is the students responsibility to manage this information. The school has a responsibility to advise students what they should be doing with this information to manage it effectively. (Maybe synch with the cloud, upload or transfer to school supported storage facilities.)
3. If students use cloud based services such as Pinterest, Tumblr, Facebook and Evernote (an electronic exercise book – only way better) then the students have a responsibility to manage this information. This includes organising, securing it and sharing it in an appropriate way. The school has the responsibility to advise students(and their parents) that they need to deal with these aspects of information management.
BOTTOM LINE: With BYOD students need to be able to manage their information in a way that allows them to access it anytime and anywhere on pretty much any device. A lost cellphone or tablet should not be a disaster.
Most Digital Technologies students will be taught about good information practices, what about the other students?