False.

For example, a “Class 2″ SD card will be much less usable in a digital HD video recorder compared to a “Class 10″ card. Basically, the class rating relates to the speed at which the card can write files to the card.

All SD cards are not alike when it comes to speed. SD cards are measured by two standards. First is the X rating, which is the same rating as CD-Rom drives (1x = 150 KB per second). An example of this would be a card measured at 150x read speed, which means it transfers files at a maximum of 22.5 MB per second. You have to be careful when buying a card based on the X rating because it could be the read or write speed. The second rating is the Class rating. An example of this would be “Class 6″, which means the card should be able to write data at 6 MB per second, so if you are buying a card for a video recorder or a high mega-pixel digital camera, it’s best to get a card with a high class rating.

This was written on Thursday, March 18th, 2010 at 6:03 pm.