Memory cards are essential data storage devices, widely used in portable electronics like digital cameras, smartphones, and handheld gadgets. Various types of memory cards are available, such as SD (Secure Digital), MicroSD, CFast, and CFexpress. Each is designed to be compatible with specific devices, offering different sizes, speeds, and performance levels.

SD Card Formats and Speeds
SD and MicroSD cards come in several bus speed classes, which determine their maximum data transfer rates. These include:

UHS I (U1): 104MB/s
UHS II (U2): 312MB/s
UHS III (U3): 624MB/s
Memory Card Capacity and Class Ratings
Memory cards also vary by storage capacity, including:

SDHC (High Capacity): Up to 32GB
SDXC (Extended Capacity): Up to 512GB
SDUC (Ultra Capacity): Up to 1TB (Fast 2.0, 2nd generation)
Additionally, memory cards are assigned classes based on their read and/or write speed performance. These include Class 10, U1, U3, and more. The class ratings directly impact their suitability for tasks like 4K video recording, high-speed photography, and rapid file transfers.

Choosing the Right Memory Card
When selecting a memory card, consider both your device’s specifications and the required speed and storage capacity. For best results, always check the compatibility with your device or consult our helpful buying guides.