If you format the drive, you'll lose everything on the caller and won't be able to get them back. If your computer isn't recognizing the caller when it's plugged in, something isn't right. If you want, shoot me a PM and I can give you a call sometime tomorrow and go over it on the phone if you'd like. First, test another USB device if you have one, like a digital camera or something like that. If your computer is picking that up, it should pick up your caller unless the cable is bad, but you said you've tried several of them, so it's probably not the cables.
