On 2013.12.02 17:49, useris wrote:
> p.s. ten buna class visokie,

Speed class rating
Class 	Minimum performance
SDHC Speed Class 2.svg Class 2 	2 MB/s
SDHC Speed Class 4.svg Class 4 	4 MB/s
SDHC Speed Class 6.svg Class 6 	6 MB/s
SDHC Speed Class 10.svg Class 10 	10 MB/s
UHS 1.png UHS Speed Grade 1 	10 MB/s

The SD Association defines standard speed classes indicating minimum 
performance to record video. Both read and write speeds must exceed the 
specified value. These are defined in terms of suitability for different 
applications:[40]

     Class 2 for SD video recording
     Class 4 and 6 for high-definition video (HD) to Full HD video 
recording,
     Class 10 for Full HD video recording and consecutive recording of 
HD stills
     UHS Speed Grade 1 for real-time broadcasts and large HD video files
     UHS Speed Grade 3 for 4K video files

The specification defines these classes in terms of performance curves 
that translate into the following minimum read-write performance levels 
on an empty card:[41]

Speed classes 2, 4, and 6 assert that the card supports the respective 
number of megabytes per second as a minimum