Speed Class is designated as Class 2, 4, 6 and 10, and UHS Speed Class is designated UHS Speed Class 1 or UHS Speed Class 3. The latest Video Speed Class was created to enable higher video resolution and recording features such as multiple video streams, 350 degree capture, VR content, or 8K and higher resolution video. Video Speed Class is designated as V10, V30, V60, and V90. Higher Video Speed Class supports higher resolution videos.
Higher class rated cards support high bit-rates of video and higher quality video recording. SanDisk Class 4 memory cards are ideal for HD video capture, and Class 10, UHS Speed Class 1 and UHS Speed Class 3 memory cards support Full HD and 4K Ultra HD video capture. Check your camera/camcorder for the recommended class rating.
For CompactFlash cards, look for Video Performance Guarantee (VPG). VPG-20 means Video Performance Guarantee enabled to ensure video recording at 20MB/s minimum sustained write speed. VPG-65 is Video Performance Guarantee enabled to ensure video recording at 65MB/s minimum sustained write speed. Performance may be lower depending on host device. 1MB=1,000,000 bytes.
