HI guys just a quick one. I have a Netgear WNDR3700 as my modem at home. I'd like to hookup an external HDD to my modem's USB or ethernet port so it can be used as a WiFi time machine backup. Don't want to be backing up via USB direct to my mac. I don't want to go purchase a Time Capsule which would work fine but I think its overpriced frankly. What other options are there that would work? Its somewhat unclear on other products from Western Digital, Netgear, Buffalo etc as to whether they will work in the way I intend (wifi backup via my Netgear router). Because every HDD works fine for time machine hookedup via USB direct but thats not what I want.