The Speed Class indicates the minimum continuous data transfer rate when writing video files to a memory card. The Speed Class number shows the transfer rate in megabytes per second. Class 2 cards are designed for a minimum continuous transfer rate of 2 MB/s, while Class 10 cards ...The Speed Class indicates the minimum continuous data transfer rate when writing video files to a memory card.
The Speed Class number shows the transfer rate in megabytes per second. Class 2 cards are designed for a minimum continuous transfer rate of 2 MB/s, while Class 10 cards are designed for a minimum continuous transfer rate of 10 MB/s. The speed classes are divided into classes 2, 4, 6, and 10.
For Full HD video (1080p), a minimum of Class 6 is recommended.