Hey all, I have been shopping around hard drive and have a few questions. I need an external HD to store my iTunes content, time machine back up, and general storage for the computers. I'm confused about external hard drives and their compatibility with Lion or Mountain Lion. I have read on some forums where additional software is required to access things in Lion or higher. Is this true? And if so, what software do I need? The devices I have setup are: iMac (2007 model, Lion) iBook (2008, Snow Leopard) 2 Apple TV's iPad 2 iPhones Airport Extreme and Express (to extend network) The second question I have is will USB 2.0 work for my needs or do I need to have Firewire 800? Thanks.