I purchased a 1TB click free backup and I have 3 computers I have set it up on. If the firewall is off it work perfect as soon as I turn the firewall on it says unavilable. I have put in all the computer ip address in the firewall settings, along with every file that was in the all users application data click free folder and said yes and allow. I'm using webroot security essentials. Any suggestions on how to get it to work with my firewall. The computer that has the harddrive connected works fine firewall or no firewall. The click free does not have a network connection it is the one you plug in to a usb port and you have a usb key you install on all the computers that are going to be using the drive.