<p>I have had four Prospec Imaging CompactFlash 8GB UDMA 6 Memory Cards fail on Nikon D800 and D4 cameras.<br>
Purchased 1 year apart different stores.<br>
Failure on 2 different card readers, 2 different computers and 2 different cameras.<br>
Corrupted after use and cannot be reformatted in any camera, or on a PC, or Mac.<br>
Still waiting for Calumet UK to agree to replace.</p>
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