A memory card is a small, portable storage device used to save digital data. Commonly found in devices like cameras, smartphones, and tablets, these cards allow users to store photos, videos, music, and other files. They come in various formats, such as SD cards and microSD cards, each with different storage capacities and speeds. Memory cards are essential for expanding the storage of devices that have limited internal memory. They are easy to use; simply insert the card into the device's card slot, and it can be accessed like any other storage medium. Many people rely on memory cards to back up important data and transfer files between devices.