By eHow Electronics Editor
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Secure Digital, or SD, is a type of flash memory card format that is used in nearly every portable media and PC device made today. These cards are used to expand the storage space on PC’s and personal media devices. While the cheapest SD cards hold only megabytes of information, newer and more expensive SD cards will upgrade your device's memory by gigabytes. SD cards are very good investments because of their compatibility with nearly every digital device you own. They can be removed from your iPAQ and shared with your digital camera or mp3 player. Follow these steps to install a Secure Digital card in an HP iPAQ.