muistikortti

Muistikortti is the Finnish term for a memory card, a small removable storage device that uses flash memory to store digital data. It is used across consumer electronics such as cameras, smartphones, tablets, drones, game consoles, and other portable devices.

The most common formats are Secure Digital (SD) cards and their variants—SD, SDHC, SDXC, and SDUC—as well as microSD; legacy formats include CompactFlash, Memory Stick, and xD-Picture Card, while newer high-speed cards such as CFexpress are used in demanding applications.

Capacities range from a few megabytes to several terabytes, and performance is indicated by speed ratings such as Class, UHS speed class, and Video Speed Class, which affect data transfer and video recording.

Cards are typically formatted with FAT-based file systems (FAT32 for smaller cards, exFAT for larger ones) to ensure broad compatibility with devices and computers.

Reliability features include wear leveling and error correction in the card’s controller, but users should still back up important data and buy from reputable brands to avoid counterfeit products.

Memory cards are removable and re-usable, allowing data to be transferred between devices by simply swapping cards.

Users should handle cards carefully to avoid physical damage and should eject cards properly to prevent data loss.