I am interested in this Seagate FreeAgent Go 320GB, but it said it was only for Windows. http://freeagent.seagate.com/en-us/hard-drive/portable-hard-drive/Free-Agent.html I heard that all hard drives were created the same, so I can format the hard drive on iDisk. Is that true? If so, would this work with Leopard and Time Machine? Thanks!