The categories of SD flash memory cards for recording video. The three class types are Speed, UHS Speed and Video Speed. Devices that support any of the UHS buses also support the earlier Default ...

The SD card in your camera needs to be large enough and fast enough for the way you shoot. Beginners and professionals will have different requirements, as will photographers and videographers.

Some users claim that the Class 4 SD cards (4 denotes the speed class rating) are more vulnerable to problems, and that upgrading to a Class 6 card fixed that. They base that on the fact that ...