A memory card reader is a hardware device used for reading data from and writing data to memory cards. Memory cards are small, portable storage devices commonly used in various consumer electronics such as digital cameras, smartphones, camcorders, and more. They store data, including photos, videos, music, and documents.
A memory card reader typically connects to a computer, tablet, or other devices via a USB port or other interface. It allows you to transfer data between the memory card and your computer or device without having to connect the entire device that uses the memory card (e.g., a camera or smartphone).