回复:两种都可能用到, 主要是Mac to Mac. 小弟先谢谢指教!
MAC MAC => use iDisk
http://www.apple.com/dotmac/idisk.html
MAC WIN => use a Thumb Dirve (read all the comments in this link)
http://lifehacker.com/software/u*****-drive/synchronize-your-u*****-drive-with-windows-briefcase-189790.php