If the card reader slot on your computer does not have the SDHC logo, it is most likely not SDHC compatible and will only read cards up to 2GB capacity. Computers and other products purchased before 2007 are not SDHC compatible. Computers and other products purchased before 2008 may not be SDHC compatible. The subsequent SDHC specification was developed to provide increased capacity of 4GB – 32GB cards. The initial SD card specification defined the interface for cards only up to 2GB capacity. This same logic also applies to digital cameras, if the digital camera reads 2GB (or lower) SD cards but fails to read a 4GB (or higher) SDHC card, then the digital camera is not SDHC compliant. If your computer's internal card reader works with 2GB (or lower) SD cards but fails to read a 4GB (or higher) SDHC card, then the computer's internal reader is not SDHC compliant. A quick line or 2 on SD and SDHC compliance
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