What I'm trying to do is use my Airport Extreme's attached hard drive (a Western Digital MyBook) as a wireless Time Machine disk. I know it's not officially supported by Apple anymore, but I did this for several months in my old apartment and it worked fine. I moved a few months ago, and just got around to setting up my TM disk now (I know, I know, I should have done it sooner ) Since it had been so long I decided to just erase the disk and start fresh. I erased it, connected it to my Airport Extreme, and it shows up fine in the Finder as a folder on the Airport. However, when I click Select Backup Disk in Time Machine preferences, nothing is found. I'm not doing anything any different this time around, I don't think... I searched the forums and found two suggestions - the first being to save a text file called "com.apple.timemachine.supported" on the disk, and the other being to enter "TMShowUnsupportedNetworkVolumes 1" into the Terminal. The text file trick didn't work and the Terminal command wasn't recognized. Any ideas on how I can get Time Machine to see this hard drive?