I had tried three different dvr207 types from three different suppliers. None of them worked properly. I understand that there are bogus look alike units being sold, but haven't figured out how to weed out the bad ones. One of them works some of the time, I have tossed two of them away.
I just received
this one a couple of days ago and so far it seems to be the one.
The other ones came direct shipped from China and I could not return them. This one through Walmart "should" be easier to return should the need arise.
First impressions are that this one is much better and seems to do the job without any issues, time will tell.