Its reliability and high performance make the SD memory card PRO Plus an attractive choice for photo professionals, creative professionals and anyone who works with digital media. The Speed Class provides information about the minimum, continuous data transfer when writing video files to a memory card. The Speed Class number indicates the transfer rate in megabytes per second. Class 2 cards are designed for a minimum, continuous transfer rate of 2 MB/s and Class 10 for a minimum, continuous transfer rate of 10 MB/s. The speed class is divided into classes 2, 4, 6 and 10. At least Class 6 is recommended for Full HD video (1080p).
The Video Speed Class comprises the five speed levels V6, V10, V30, V60 and V90, whereby the number in each case indicates the minimum write rate in megabytes per second (MB/s). By combining a device with a Video Speed Class label and an SD memory card with the same Video Speed Class label, you can capture memories in the best quality. The fastest options V60 and V90 support 8K resolution, while V6, V10 and V30 reliably capture Full HD and 4K resolution. UHS-I capable SD cards enable theoretical data transfer speeds of up to 104 MB/s. The speed class is specified as U1 or U3: U1 for full HD videos - and U3 for 4K videos. Memory cards with support for UHS-I are backwards compatible and can be used in devices without UHS support (with limited performance).
