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MicroSD cards are compact storage devices used in electronic devices such as smartphones, tablets, and digital cameras. They offer removable memory to expand the device's internal storage capacity, enabling users to store more files, photos, videos, and applications. These cards come in various capacities ranging from 2GB to 512GB, with higher storage capacities offering better value for money. MicroSD cards follow specific standards defined by the SD Association, such as SDHC (Secure Digital High Capacity) and SDXC (Secure Digital eXtended Capacity), which determine their compatibility and performance levels. These cards also support different speed classes to ensure smooth recording and playback of high-definition videos and data transfer rates. In summary, MicroSD cards are small yet powerful storage solutions for portable electronic devices that offer flexibility, convenience, and expandability to users who require additional memory on the go.