5D Mark IV Automatically Stops Recording on Fast SD Cards

[ahvlam]

I've been shooting video with no problems using a SanDisk Ultra Plus 16GB 80MB/s SD card and recently picked up a second one. The exact same card.

On the first one, I can shoot as long as I need. The new one I bought stops after 5-10 seconds. I tried formatting it in the camera and on my PC without any luck. I also bought a few Lexar Professional 32GB 95 MB/s cards and they stop after a couple seconds as well, even after being formatted.

Any other suggestions for things I can try? I'd really prefer not to have to return these and buy CF cards but I'm losing hope and have an event next weekend....

Thank you!

[Waddizzle]

Record 4K video to th CF card.

[ahvlam]

I'm actually just shooting 1080p and it's still happening. 😞 If I can't find a fix I will just replace them all with CF cards but I'd prefer not to as they are so much more expensive..

[Waddizzle]

Try using the Sandisk Extreme SD cards.  You are using one of the cheapest cards they make.  Be sure to do a low level format in the camera with any card that you use, too.

[MikeSowsun]

I would suspect a counterfeit SD card if it is not performing up to spec. Lots of counterfeit cards out there. 

[Waddizzle]

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@MikeSowsun wrote:

I would suspect a counterfeit SD card if it is not performing up to spec. Lots of counterfeit cards out there. 

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I suspected an off brand card.  Have not ruled out a counterfeit card, either.