I'm new to the Apple world. This year I went from iPhone 4 --> iPad 2 --> MacBook Air 13 in a matter of months! My new question though is related to these external HDDs. I have a lot of movies saved on my PC hard drive (WD My Book 500GB) but I want to sell it and upgrade (capacity and portability). Currently it is partitioned to FAT32 and NTFS for my PS3 and PC backup respectively. I want to go with a Seagate GoFlex because I eventually want to make use of the Thunderbolt port. What I am confused about is this: Can I use any Seagate HDD with my mac? If I buy a non-Mac specific HDD from Seagate will I be able to just format it to use with Mac? How will this effect my use of Time Machine? What is the difference between the Seagate GoFlex and GoFlex Pro models other than the dock??