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Is there a free Windows utility that I can use to check the quality of an SD card?

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Depends on what you mean by "quality". If you hope to get an answer I think you'll have to add more details about what you are hoping to learn to your question. – irrational John Sep 5 '10 at 15:15

The standard version of Flash Memory Toolkit is free, although the write error and benchmarking tests are disabled. Bear in mind that even just making these tests reduces the life of your flash memory.

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