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SD cards are compact, portable storage devices used primarily in digital cameras and mobile phones to expand memory capacity. These rectangular cards store various types of data, including images, videos, music, and documents, by utilizing flash memory technology that enables fast read-write speeds and reliable performance. SD cards come in different capacities ranging from a few megabytes to multiple gigabytes, providing users with ample space for storing important files. The high data transfer rates make these cards suitable for real-time applications such as live streaming and gaming while their small form factor facilitates easy integration into compact devices like drones and smartwatches. With the advent of newer technologies such as UHS (Ultra High Speed) SD cards, users can now benefit from faster data transfer speeds, ensuring smooth workflows and seamless user experiences. Overall, SD cards are essential components in modern electronics that facilitate convenient data storage and sharing across multiple platforms.