Minneskort

Minneskort, or memory card, is a small, removable storage medium based on flash memory used to store digital data in a wide range of devices. They are commonly found in cameras, smartphones, tablets, laptops, drones, and portable gaming consoles, providing expandable storage and easy data transfer.

The most widespread format is the Secure Digital (SD) family, which includes SD, SDHC, SDXC, and SDUC cards, as well as their smaller, device-friendly microSD variants. Other historical formats such as CompactFlash, Memory Stick, and xD-Picture Card are still in use in some niches, but have largely been supplanted by SD in consumer devices.

Capacity and file systems vary by format. Cards range from a few megabytes to many terabytes, with microSD cards commonly offered up to 1 TB and SDXC/SDUC cards up to 128 TB in theory. File systems used on larger cards typically include exFAT for cross-platform compatibility, while smaller cards may use FAT32; some devices also support NTFS or ext4, though cross-device compatibility is not guaranteed.

Performance is influenced by format, class, and interface. Speed classes (such as Class 10), UHS Speed Class (UHS-I/II), and Video Speed Class indicate minimum sustained write speeds suitable for recording video or rapid photography. Emerging standards like SD Express introduce PCIe/NVMe-based interfaces to achieve higher transfer rates, while still maintaining compatibility with existing SD card ecosystems.

Usage and care: Minneskort are designed for quick data transfer and portability, but data integrity depends on proper handling. Protect cards from physical damage, keep them clean, and use reliable readers. Eject media correctly to minimize corruption, and back up important data regularly.