Hi, I am thinking buying an additional external drive and I was considering the WB My Passport Studio 500gb, mainly for its F800 cable and its 5 year guaranty. I already have a WD My Passport 500 gb, which I use as a backup device. So far I haven't had any issues with it. However, I've read many controversial comments on the US Apple store about the WD Passport Studio 500gb. Many customers have reported problems with the firewire chipset and cable. Some even lost their backup. Since I want this external drive mainly for backup purposes, I would like your opinion. Has any of you bought this drive? Thanks, I.