This world has been played on for a year or nearly a year by 2 people, myself on Xbox One and my boyfriend on Windows 10. It is his world. Suddenly it corrupted (see error message) and we lost a bunch of chunks. We noticed the first sign of corruption on Tuesday (this is posted Thursday) and that is shown in the screenshot taken in a forest biome a good distance from our house but at the time we didn't realize what it was. We have files for the world taken about 40 minutes before it corrupted fully but we aren't sure what we can do with them.