iPhone Generation : 3GS
Unlocked? (or Part Number): officially unlocked
Current Firmware : 4.1
Current network: Maxis
iTunes Version : 10
PC/MAC : PC Windows 7 64 bit
Jailbreaking software : not jailbreak
Problem Encountered : Just want to transfer all my song file in my iPhone to my PC because all the physical file on my desktop had been accidentally deleted.
Steps Taken So Far :
Screenshot of Problem(if applicable) :
Other Information/Remarks :

All the software I encountered so far had been paid software. Can anyone suggest me a way to transfer all these files for free? What kind of software to use without jailbreaking the iPhone.