I just replaced my Pro-HD that would disconnect every 2 mns from my WDTV Live, ipad, MacBook Air. I now have the M1 which works fine on everything but the WDTV Live. I get error code 22 asking to upgrade my firmware which I know is up to date. I see that the M1 does not show up in the list of supported devices on the WDC website but I thought that this is due to the relatively recent release. Any clues? I have also asked WDC for a solution.