Micro SD cards are small, removable flash memory cards that are commonly used to expand the storage capacity of electronic devices such as smartphones, digital cameras, and tablets. These cards are designed to be compact and portable, making them ideal for storing photos, videos, music, and other files. Micro SD cards are available in various storage capacities, ranging from a few gigabytes to several terabytes, and offer fast data transfer speeds. They are compatible with a wide range of devices and can easily be inserted into the device's memory card slot. With their high compatibility and storage capacity, Micro SD cards are essential for anyone looking to expand their device's storage options.