For a decade or more I've used Dropbox as a place where I store files from jobs I've worked on. These are files I don't work on anymore, but use to look things up. Last week I wanted to check something, and discovered that my Dropbox was empty. Except for the file "how to start with Dropbox", all my files are gone. I contacted customer service. To no avail. Do files go missing more often on dropbox? Can we sue Dropbox if they do? Anybody with experience in this?