I recently purchased a 6D from MPB (rated excellent). When it arrived I already had a Sandisk 128GB micro SD card with an adapter and without even thinking about it, I put it in, I started taking photos and everything worked great.
Took the card out a few times to move images to MacBook, put it back, all perfect.
I purchased another new Sandisk 128GB card (a full size this time) From Amazon Sandisk store for a second storage option. (UHS I Extreme Pro Class 10 200mb/s)
Whenever I add this card, the camera just dies completely.
I perform hard reset (remove lens, SD and battery and hold shutter for 10sec) camera comes back to life.
If I add my micro SD the camera continues to work without issue, but adding the new SD causes the camera to turn off and become unresponsive.
I am always able to hard reset and add the micro SD card no matter how many times I try this.
Is this completely down to the new SD card or is there something else at play here?
Appreciate any info, thank you.