Hi everyone, I plan to buy a new external USB 3.0 hard disk for my retina Macbook pro. The hard disk will be used for 2 things : Bootcamp games will be installed on this hard disk Classic file storage & backup (and maybe my iPhoto library) Because of the first point, I'll need a hard disk that has a good access time / transfer rate. Of course it has to be USB 3.0. After some researches, 2 models appears to be quite interesting : Lacie Porshe Design P'9233 (specs) WDC My book essential (Specs) Both are USB 3.0. The Lacie is much more beautiful than the wdc but I've read that it has a 5400 RPM drive inside whereas the WDC has a 7200 RPM inside (Western digital caviar Black). Logically, the My book will be faster than the Lacie but also louder. Lastly, it appears that the Lacie model has a special usb 3.0 designed to be faster on OSX. What would you choose between those 2 hard disks? I really like the lacie one but the fast that it has a 5400 RPM drive scares me a bit for the access time. thank you !