Kingston Class 4 16GB Micro SDHC card Top-Price

Kingston Class 4 16GB Micro SDHC card

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doesn't work. loses data.
Using this product with an android phone. Copying files (music/ photo) from pc over to the memory card appears to work fine, until you look on the phone to find that 80% of the files haven't copied after all. Frustrating after the 1st time; infuriating after the 2nd; $^&^&!&"