There's a limit to the phone's read/write speed to the SD card itself. Do check the limitation of the phone first before investing in that class 10. In most devices it is unnecessary to get Class 10.

A lot of the time (in fact, most of the time) the so called speed can be increased by simply modifying the read cache value in ROMs.

http://forum.xda-developers.com/showthread.php?t=1010807

Here's an app to go with it:
https://market.android.com/details?id=com.sdincrease.it

Do not proceed without understanding what you're doing.

anyone can teach me how to upload a lot picture from phone which use camera to capture ??
today i capture a lot picture with using my phone
but i was found i can't upload the picture that i wan all at once to upload
only can upload 1 by 1
and how to copy the picture that i use my phone capture to computer so i can use computer to upload ??