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, and have different storage capacities, ranging from a few gigabytes to several terabytes. Memory cards use flash memory technology, which enables quick data access and transfer. They are designed to be easily inserted and removed from devices, making it simple to transfer files between different gadgets. Many memory cards also have built-in protection features to safeguard data from accidental deletion or corruption.