I am using xpreria T3, as soon I have transferred the picture from internal to SD card all picture get deleted. Please help

Hello!
Your SD card may be defective. Connect it into card reader and test it ( also backup your information into your PC ).
How you transfer your pictures from internal to SD storage ? which app you use ?
 
Hi,

I am doing internal storage to SD card, whit out any app, just settings > storage> transfer to sd card.

As soon as i perform the above steps all my photos that too only whtsapp pics get corrupted and photos that I have downloaded from facebook or i clicked it from my phone nothing happen to them.

Please suggest.
 
I will advice you to contact Sony Support for that trouble. http://esupport.sony.com/
If needed you can factory restart that phone and the problem may be solved.