Transfer of files and apps from old sd card to new sdcard I have got a new 8 GB SD card, but the catch is I have done the app2sd stuff. So what are the steps to be followed for the data and apps transfer without loss of anything.

Will a simple copy and paste including all hidden files be enough?
Depends on how the copy is performed. The SD card contains a couple of hidden files/directories (especially with App2SD being used, there's the .android_secure folder to be considered).

Usually, when on a Linux workstation, a complete copy from sdcard#1 to sdcard#2 should do the job (cp -dpR &lt;source&gt; &lt;target&gt;). Same should apply to Mac OS. As I have no Windows, I cannot speak for that.