Both my wife and I are new to the Mac world. We both have MacBooks and I am having trouble with a Seagate Free Agent Go. When accessing the usb drive in Mac I can read the data but cannot write back on to the drive. Is there something I need to know. The usb drive has been used on a pc for quite some time and works flawlessly. We are trying to migrate to the MacBook and we need to be able to read and write to this usb drive. Can anyone shed any light on the situation?