SDHC / SDXC

SD Memory Cards Explained

SDHC / SDXC
The main difference between SDHC and SDXC cards is storage capacity. SDHC cards (Secure Digital High Capacity) have a capacity range from 4GB to 32GB, while SDXC cards (Secure Digital eXtended Capacity) start at 64GB and can go up to 2TB.

UHS-I vs UHS-II
UHS-I cards transfer data up to 104 MB/s, while UHS-II cards are faster, reaching up to 312 MB/s. UHS-II achieves this with two rows of pins for quicker data transfer. Faster speeds help photographers and videographers save time when moving large files and shoot more without delay.

Video Speed Class
Video Speed Class ratings (V10 to V90) show the minimum write speed of an SD card, from 10MB/s (V10) up to 90MB/s (V90). UHS-I cards support speeds up to V30, while UHS-II cards can handle faster speeds like V60 and V90.
• V10:  SD cards rated V10 are ideal for still photography and Full HD 1080p video recording @ 30fps.
• V30:  SD cards rated V30 are ideal for 4K video recording @ 30fps and RAW burst photography.
• V60 & V90:  SD cards rated V60 and above are ideal for 6K & 8K video recording at high frame rates, as well as simultaneous multi-file recording (example: RAW + JPEG, multiple video streams created by 360º cameras, video + still + GPS data, time-lapses, etc.)