One of the artists in the development team I'm apart of, recently had a major issue. She had a portable hard drive that she kept everything on. Generally speaking this usually works very well, and lots of students here have a portable hard drive, USB or something that they carry with them. Otherwise things all go up to the cloud, and people pull things down as they need them. But here's the issue: What happens when those things don't work? You MUST have a back up plan.