These memory cards only have a shelf life of approx. 2 months. Along with my wife and I and all the devices we own, we had to buy some memory cards. In the last few months we have upgraded all the memory cards in our Samsung devices. So far 3 Samsung memory cards have failed and another one seems to have failed due to write errors occurring from time to time. To date, for every card we've attempted to file a warranty claim with Samsung for, Samsung has denied the claim, claiming that the memory card has been misused, or that too much data was stored on the card, or that the serial number on the card was an invalid serial number, and the memory card was most likely fake. All these cards came from Amazon, I will not buy another Samsung device let alone Amazon if fake Samsung memory cards are available on amazon.com. TL; DR memory cards lose their ability to write data after 2 months and Samsung will not honor the warranty on their memory cards purchased from amazon.com.
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