I got a
LG mp3 player

It is 4GB capacity mp3 player, when I am trying to transfer the data in to it, it is giving me format erro and when I try to format it,After completing the processes it is saying that the format is done successfully. but the player is not getting format. After doing so when I tried to transfer the Data again it says that the file system is corrupted. But, at first when I got it I am able to transfer the data in to it, but not now. Please help me regarding this

the device you want to unlock is active on another customer's account