I purchased a WD 2T My book NAS and hooked it up to my Airport Extreme. I have an IMac and a MBP. Initially both machines using time machine worked and performed a backup with no issues, other the the length of time it took. This has been working for a couple of weeks with few issues. Now time machine will not see the drive with either computer. Both computers see the shared portion where I put music and movies. I have found rebooting, and going into the WD admin tool sometimes helps and it will run for a day or so but I have been unable to get it to work for the past couple of days. There is still over 1.2 TB available on the drive. Has anyone run into this and how did you solve it? I would like to continue to use time machine and leave the drive on the router if possible. Thank you in advance.