A couple of weeks ago I bought a couple of Sandisk 64GB extreme cards from China that were refurbished, the idea being to use them as backups in the 2nd SD slot on my DSLR. I couldn't get my PC to work with either of them, as each produced a message saying they needed to be formatted, and when I tried doing so the Windows utility said there was only 1 MG of space available. I tried using SD Formatter, and even followed an online tutorial to try cleaning the cards at MS-DOS level, but nothing worked. Yet oddly enough, both cards work just fine in the camera - they format fine, all the room is there, and when I connected my camera to the PC I was able to transfer the test pictures over. I figured that maybe there was some minor technical hitch, and ordered in another identical card, but this time I ordered it new through B & H. Well guess what? When I tried hooking it up to my PC - and my wife's work laptop with it's own built-in card reader - the same issue came up!
Can anyone shed some light on this, because it's driving me nuts trying to figure it out. It obviously can't be the cards but some other kind of glitch.
Thanks
Update.
I took all three SD cards to Best Buy where one of the Geek guys checked them out for me as a courtesy - worked fine on their PC. So obviously there's some kind of glitch in my computer. I run Windows 7 64 Bit, so I can't see how that's an issue. It can't be my card reader, because if I slot in some other SD cards (Sankdisk, but not the same type or size) the computer reads them without a problem. Could there be something in the architecture of the Extreme Plus cards that's conflicting with or confusing my PC, or just the size - these are the first 64GB cards I've bought? Just very weird behavior.
Can anyone shed some light on this, because it's driving me nuts trying to figure it out. It obviously can't be the cards but some other kind of glitch.
Thanks
Update.
I took all three SD cards to Best Buy where one of the Geek guys checked them out for me as a courtesy - worked fine on their PC. So obviously there's some kind of glitch in my computer. I run Windows 7 64 Bit, so I can't see how that's an issue. It can't be my card reader, because if I slot in some other SD cards (Sankdisk, but not the same type or size) the computer reads them without a problem. Could there be something in the architecture of the Extreme Plus cards that's conflicting with or confusing my PC, or just the size - these are the first 64GB cards I've bought? Just very weird behavior.
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