I have a strange issue with one type of SD card…
I have bought 3 of the following SD cards end of last year:
SANDISK Extreme 16GB SDHC UHS-I SDSDX-016G-X46
(the new gold label ones)
Till now 2 is absolutely dead. Ths situation is that, when I start recording video (tested with several different cameras) it gets very warm. I could only use my cards once, because after I finished recording the card was unreadable. The next card was failured during the recording process. I have tested these cards in Canon 6D, 5DM3, G16, the situation is was the same. The card and the camera body gets hot in a few seconds after start the recording and the cards go wrong. For using photographs only card is fine.
After it goes wrong, I can not even read the cards with card-reader, dslr, imagebank device or any other reader devices. Can not even format the card. There is no any media anymore in the card-reader, so it is definetly failured.
I have get my money back from the reseller partner in HU, they were very flexible. I am using Sandisk SDHC and CF cards for yeards now for professional photography. I have dozens of cards from the old grey and black ultra and extreme series, but this gold label ones are pretty bad.
I do not know have you ever see this situation in your hands, but these cards are totaly unstable and useless for HD recording for me
Have you got any idea what caused this problem with this cards?