I need your advice on data transfer

there are many ways to transfer data between computer and cellphone. You can use Bluetooth, InfraRed and data cable. data transfer is prefered one, Because it can transfer with high speed connection. DOnt worry to ruin it, You can use your PC suite to detect your cellphone and doing something with your phone ( it safe ) and also dont worry about virus.. both computer virus and cellphone virus will not be affected with the other one.

The option is bluetooth like as the other friend mentioned, you also do it with data cable there is no harm in doing it. As you do not want to ruin your mobile then first give a check that there your system has no virus in it. and at the same time also scan your mobile for any virus in it. I have done data transfer many many times and till now did not face any problem. If you wish to then go ahead ALL THE BEST