Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_8 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8E401 Safari/6533.18.5) Please forgive this noob question. I'm new to OS X. I have an external HD, iomega I think. It can formatted for Mac, and works great on my MBA. I want to be able to use it to transfer files between my windows machine and my MBA, along with do time machine backups. Is there a format I can format this drive to that works on both systems? And how do I format it on OS X? Thanks.