6D, Video Stopped Recording Automaticly on 64gb Transcend Class 10 UHS-1

[Lana_G]

I have a problem with recording video on my 6D camera with pretty fast and decent SDXC card. This one

What is most strange about that is that this error message is very inconsistent. One day I can write uncompressed 1080p 30fps for 30 minutes with no problems. But every now and then when I start video recording I almost immediately see the buffer bar going up, it allows me to record between 7 and 12 seconds before giving me the error message. When I start recording again right after it usually works fine and allows me to record as much as I want.

I wasn't able to recreate this problem, it just happens randomly. I tried reformatting my card with low-level format several times. Whenever I do, I can be sure I will record without any problems next few videos. But then after I fill the card with maybe 16-24gb of data it happens again. Or it won't.

I tried to use different settings, trying to start recording right after burst series of shooting RAW images, deleting videos I already shot without reformatting and shooting again, changing batteries and using half charged batteries. I wasn't able to recreate this error message, it works flawlessly. But then it will screw me in the most inconvinient time during a shooting session.

I wonder what's wrong. Is it a bad card? Is something wrong with my camera? Maybe I am doing something wrong?

[Lana_G]

Well, for anyone wondering, I did excessive testing and came to a conclusion that it was in fact a bad card. I still use Transcend for photos, it handles it well, but for videos it's obly Sandisk. Since I've bought it I captured more than 2tb of raw phootage on it and not once I encountered that problem, so I think it's safe to assume the card was the culprit.