For Christmas I got a 750 GB Western Digital Hard drive. (Acually is only 688GBs) My iMac has a 500 GB internal hard drive. I was debating getting two smaller HDs. one for Time Machine and one to use for my itunes library, but instead I partitioned the Hard drive. 500 GBs for TM and the rest for iTunes. So, does this sound like a good idea? What are the chances I could loose my iTunes Library?