I've never had a card to fail. One precaution I take is to format the card in the camera where I am going to use it, and I don't write anything to the card from anything else. I don't know whether that helps, but it seems to make sense to do.
I have had a card not to work in a particular camera. Last fall I bought a G7X II for my travel camera before I left on a long driving trip through the Rockies that concluded with a swing through the Florida Panhandle and to Savannah and Charleston. (Didn't make much sense to me either, but my friend in OK wanted to visit those cities while we were out.)
Since I hadn't had much time with my new camera, I took along my venerable S120 as a backup. I never needed to use it on the trip, but it had a 32GB card in it that I was going to use when I filled up the one in the new camera. When the time came, that card wouldn't work in the new one, though it did fine in the S120. It wasn't ancient or offbrand, but must not have met the G7X's requirements. I didn't bother with researching, but just popped in a 4GB card I had along, and then bought an 8GB card at the park's visitor center, and added a 64GB card from the next Wal-Mart we encountered. All those RAW files wound up on my computer's SSD and presumably are backed up in Time Machine, and resultant JPEGs of my favorites are posted on line. If I lose any of the originals, I'm unlikely to miss them at this point.
I have had a card not to work in a particular camera. Last fall I bought a G7X II for my travel camera before I left on a long driving trip through the Rockies that concluded with a swing through the Florida Panhandle and to Savannah and Charleston. (Didn't make much sense to me either, but my friend in OK wanted to visit those cities while we were out.)
Since I hadn't had much time with my new camera, I took along my venerable S120 as a backup. I never needed to use it on the trip, but it had a 32GB card in it that I was going to use when I filled up the one in the new camera. When the time came, that card wouldn't work in the new one, though it did fine in the S120. It wasn't ancient or offbrand, but must not have met the G7X's requirements. I didn't bother with researching, but just popped in a 4GB card I had along, and then bought an 8GB card at the park's visitor center, and added a 64GB card from the next Wal-Mart we encountered. All those RAW files wound up on my computer's SSD and presumably are backed up in Time Machine, and resultant JPEGs of my favorites are posted on line. If I lose any of the originals, I'm unlikely to miss them at this point.
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