Currently Being ModeratedDec 11, 2012 9:17 AM (in response to NewUserfromMac)
It's recommended NOT to use your AirPort Extreme for backups Mainly because the Time Machine software was not deigned to work with the AirPort Extreme and the Extreme wasn't designed to work with Time Machine. That's why Apple has the Time Capsule, for wireless backups.
Try connecting your hard drive directly to your computer.
Currently Being ModeratedDec 11, 2012 9:40 AM (in response to NewUserfromMac)
Please check out this Pondini article on how to access Time Machine backup files.