Here is where Apple lies, blatantly and repeatedly, about the Airport Extreme and how it can share your external hard drive. "Turn your external USB hard drive into a drive you can share with all the users on your network."
Then when you try and actually hook your hard drive up to the $180 router and you get an error message, you find out it doesn't support external drives for the latest versions of Windows like XP, 2000 and Vista (those using NTFS, the modern standard for Windows hard drives). NOWHERE did Apple disclose this, not online and not in the damn manual for the product.
An honest marketing pitch would read, "Turn your external USB hard drive into a drive you can share with all the users on your network by reformatting it and destroying all the data."
Oh and of course they've already obsoleted this product.
Oh and also? This "easy to use" brand new router didn't work with the software that shipped with my brand new Mac. I had to install a second AirPort Utility beyond the one already on the hard drive.
And no I'm not going to format the drive, it contains all the data from my old computer, and from at least two online accounts.
(PS Not even the tech specs of Airport Extreme divulge that NTFS is not supported.)