In our school we share 2 carts of iPads with 600 students. Although we do A LOT of work around digital citizenship and the respect of other people's work, we still have the occasion when work gets deleted. Book Creator app has the ability to upload it's files to Google Drive and then download them again when needed.
When students put a lot of effort into a project, the worst thing to happen is that it gets deleted. This tutorial will hopefully fix that.