Why can't my new SDHC (4GB to 32GB) or SDXC (larger than 32GB) card be accessed by my computer?

When you plug in a "High Capacity" (including SDHC, miniSDHC, and microSDHC) or "eXtended Capacity" (including SDXC, miniSDXC, and microSDXC) Flash memory card  into a either an external USB Card Reader or a card reader built into your computer, that reader must be compatible with the SDHC or SDXC standard.  Such cards are not compatible with older card readers.  Inserting an SDHC or SDXC card into a card reader designed only for the original "SD" standard could have unpredictable results from simply being not recognized at all to potential corruption of critical file structure data that would make the card inaccessible.

You might see an error that says "Please insert a disk into drive x:" like this:

Or worse, the error might say the drive is inaccessible or there was an I/O error.

Suggestions:

1. Make sure you are using card reader compatible with SDHC or SDXC.

2. If the card still works in your digital camera, try connect the camera to your computer with the camera's USB cable and access the card through the camera's card reader.

3. If you think you might want or ever need to recover the files from that card, do NOT format or attempt to put more data onto the card with an incompatible reader.

 

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