SD Class 4. = 4MBps and Class 6. = 6MBps.
They say on the Internet Class 4. and 6. are good for Recording Hight Definition Video.
Then they say Class 10 = 10 MBps and it is good for FULL Hight Definition Video.
So why do they say Class 4. and 6. are good for High Def but Class 10 is good for Full HD what is FULL HD is this not High Def?