Canon 6D footage disappearing

[Joseph Ray]

I took a few test clips with my Canon 6D, shooting 1080 30p. I import the clips into a new event, and I begin putting them into a timeline to play with and everything works fine then after a couple minutes all of my clips turn red and can not be played.

 

[Andrius Simutis]

Hard drive sleeping?

 

[Alchroma]

Also Switch App Nap off.

Al