Hello, I have bought two different Western Digital external hard drives now, and have had terrible luck with both. The first was a Western Digital Passport I put files onto it, unmounted it replugged it in and they where gone! Then the second was thier brand new MY BOOK 500GB model I set it up, and was trying to put in folders how I wanted and then when I would click on another folder it would rename itself to the last folder I created. I have found these Western Digital products as much as I want to like them suck for mac. I reformated the drive per the instructions, and it was fine. Until I started adding the folders and stuff.. Unreliable. I have a Maxtor II One Touch 300GB that works great, and other ones people know work well for mac?