SD Card Speed Class

How many of us who know about the class divisions in SDCard? No no no, I mean "class" here is not the amount of capacity in SDCard (such as 1Gb, 2Gb, etc.) but the class what I mean here is the class in terms of speed rating.

In fact, SDCard not only differentiated in terms of capacity, but also in write-read speed. To determine the speed difference on SDCard, you can notice the logo in the form of circled number contained in the physical SDCard. For more details, can be seen in the table below:

The table above has explained all the important information about the SD Card class speed difference. So, how it performs in the real world?

In a real time, with applications that require sustained write throughput, such as video recording, your device might not perform satisfactorily if the SD card's class rating falls below a particular speed. For example, a high-definition camcorder may require SD card of not less than Class 6, you will suffering dropouts or even corrupted video if a slower card is used. Digital cameras with slow cards may take a noticeable time or delay after taking a photograph before being ready for the next, while the camera writes the first picture.