Default Backing up whatsapp contacts and message conversations from bluestacks to phone

Hey guys,

Since I'm having my board exam, so I don't have my phone right now with me and I'm using whatsapp on bluestacks app players. But after exams are over, I'll be soon back with my Xperia U. So guys can you tell me how do I backup my files, folders, apps, whatsapp full media and its full conversation with people I chat with and every single goddamn thing from bluestacks to my phone??

Thanks in advance.
MY DEVICE - Sony Xperia U
EXAMS EXAMS EXAMS..!!!! OUT OF DEVELOPMENT..!!!! WILL BE BACK AFTER APRIL'14

HIT THANKS OR BUY ME A COLD-DRINK. I LOVE IT