Originally Posted by harolds
If it does, then why isn't it a class 6?
As has been said - the class of the SD card just guarantees you a minimum speed - in fact, a minimum sequential write speed.
I get the following:
16gb Sandisk Class 2
Sequential Read : 20.050 MB/s
Sequential Write : 7.415 MB/s
8gb Transcend Class 6
Sequential Read : 19.938 MB/s
Sequential Write : 15.020 MB/s
(Tested using CrystalDiskMark 3.0 with both cards in an adaptor directly connected to the PC via USB)
Both cards well exceed the minimum 6MB/s for Class 6, with the Class 6 card coming out as twice as fast as the Class 2.
If you're using a high-res digital camera, you will notice that write speed difference as it will decrease the amount of time it takes to save a picture and thus how quickly you can take the next. However, in general use on a phone you just will not notice this, making the Sandisk Class 2 card a much better buy.