This little card worked great for a Wi-Fi security camera. About 2 months. The card was suddenly no longer recognized by my camera. I took it out and put it in my laptop to find that my laptop also had trouble recognizing the card. I tried several SD card adapters from different manufacturers before my laptop was finally able to read the SD card. The problem was that now it didn't show the storage capacity and kept failing when formatting the card. Again, I tried different brands of SD adapters. The Sandisk brand finally let me format the card. After that, my 64GB card only showed a meager capacity of 119MB. I found a forum that suggests inserting a freshly formatted SD card into a phone, digital camera or other device and reformatting right from there. I put my SD card back into the wifi security camera and it showed a capacity of 512MB. Finally, after formatting with the camera app, it showed the original capacity of 64MB. I took it out and put it in my laptop to check it out.
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