After hours of searching i can not come up with a straight answer. My network is currently set up as so----- Cable modem to my airport EXTREME and have 3 airport EXPRESSES connected to the EXTREME wirelessly. 2 of them i use for airtunes. Can i use the 3rd to connect a NAS drive and use time machine on my mac to backup to it? If so what settings do i need to enable on my EXTREME as well as the EXPRESS. Thanks guys!!