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Windows XP cannot see SDXC (64GB or 128GB) card

First and foremost, please make sure that you are using a SDXC compliant card reader.  If the card reader does not support SDXC media, it will not be able to properly recognize your SDXC card.  For more information, please refer to the article on the Secure Digital Association website in the link below.


  • Example of a card reader that supports SDXC = IOGear GFR204SD
  • Example of a card reader that does not support SDXC = IOGear GFR209W6

If you are unsure if your card reader supports SDXC cards, most SDXC compliant products will bear the SDXC logo.  In addition, SDXC compliant products were not available for purchase until late 2009 / early 2010.  If your card reader predates that time, then it is unlikely to support SDXC media.

Next, you will need to install a Microsoft Hotfix for your Windows XP operating system.  Read on for more info.

SDXC cards are formatted with the exFAT file system.  The exFAT file system is supported by OS X 10.6.5 or later, Windows 8, Windows 7, Windows Vista SP1 or later, and Windows XP SP2 or SP3 with Hotfix KB955704.  Without Hotfix KB955704, Windows XP may experience trouble reading, writing or formatting media formatted as exFAT.  Flash based storage media (like SD cards) that is larger than 32GB is formatted as exFAT due to a Microsoft limitation of the FAT32 file system.

Options to resolve the issue:

If you still need further help, please let me know.