The reason I ask is that I recently attended the LA Photo Show and the SanDisk rep there told me that swapping memory cards between different cameras is a very bad idea. He told me that the reason is because it will lead to disc corruption and dramatically reduces the life of the memory card.
Previously, I have done this (swapping between devices) many times, always formatting the SDXC card, after placing it in the new camera, just as a precaution. My experience comes from way back when I used to format my 1/4" floppy discs when using them in a different PC, as a way of making me feel that the disc is going to read/write ok, if the format worked smoothly.
I realize that I should probably just accept the SanDisk product reps advice, but I was wondering if there are any studies or documentation to support this? I have Googled it and can't really find anything substantial. Most cameras create their own folders with different names, but these files are created automatically on a newly formatted card when the camera is turned on for the first time, after the formatting.
I have several large and expensive Pro Extreme SD memory cards and several digital cameras (Canon T3i, Canon 5DM3, etc), so this concerns me.