Originally Posted by terzer
However my Sandisk memory card doesn't have circle and number. Then how can l find out which class it is?
without number on the card only a transfer test can give you an answer.
When you have an adapter to use the card with your pc card reader, you
can stop the time to transfer e.g. 100 MB to the card. Devide the 100 MB
by the time and you have the writing transfer rate (e.g. for 10 s:
100 MB / 10 s = 10 MByte / s ), repeate this with reading the 100 MB
back and you have the reading transfer rate.
Class 2 - 2 MB/s minimum writing
Class 4 - 4 MB/s minimum writing
Class 6 - 6 MB/s minimum writing
Class 10 - 10 MB/s minimum writing
Stop time after finished copy process - pc somtimes uses write cache
and displays multiple of real rate.