I work for a particular tech company doing chat based support where I troubleshoot a certain email application.

And one of the most common phrases I get is: "Hey Mister IT Guy, I am suddenly missing all of my contacts and Calendars. This super sucks! I had to rebuild my email profile to make my email work again!".

I really wish when they teach computer literacy in school they drilled "Learn How To Back Up Your Junk" more so when stuff like this happens I can get them back up and running in 10 minutes instead of telling the user they are going to have spend hours rebuilding their calendar and contacts.