Broken 4k files? Fix?

[IceFireSoul]

I was working yesterday, shooting in 4k. And now - TADA! Two files are corrupted. They end abruptly before their end. And that's it. WTF? I am using the latest firmware update. Crappy camera? Any ideas of a fix?

 

[IceFireSoul]

I am soooo serious. This is the SECOND time this happens. Is it just like that? "Sometimes it works, sometimes it doesnt"?