At times I get so bugged when I have to write some data on my cellphones memory card. Especially larger files upto 2GB it takes approximately 15 mins. Was quite curious to know 'Why?'. Like every other consumer I ensure that I brought this from a branded company then why still is it taking that long.

After some research found that all SD cards have a specification like 'Class'. After going through the below mentioned link, I was able to figure out the issue.

Hope you guys find this information helpful on your next purchase or upgrade of your memory card.


Cheers!

Secure Digital

Just a reference on types of 'Class'