Per Amazon: https://www.amazon.com/product-reviews/B00F0R9V76
UPDATE
The system is working really well now. I've upgraded the hard drive to a Western Digital® My Passport Ultra External USB 3.0 Portable Hard Drive, 1TB that works smoothly and also is the same size as the DNR-202L so they sit on top of each other nicely. Just to add to my previous notes:- I've changed all the cameras and the recorder to static ip addresses so that after a power outage the system should boot up correctly and every camera links to its correct ip address as stored by the DNR-202L.
Both of those drives are probably from the newer series.
The other person here couldn't get a 1 TB drive working.
My model: WDBBKD0030BBK
Your model: WDBMWV0020BBK
Search on this page both model #s:
http://www.wdc.com/en/products/catalog/?segment=2Maybe my unit is a
freak unit.

I don't know. I can only assume it's the drive series without testing more drives. I do have some older Passport drives, but they have data on them, and I'm not going to experiment just yet.
I'll plug in the 2nd new drive (#WDBBKD0030BBK) and see if the DNR 202L gets overloaded from power issues.