My external drive - Western Digital "My DVR Expander" - was working perfectly for over a year with SARA - however once the change to Navigator - I started having trouble - my SA8300HD had to be swapped out, and that solved the DVR issues I was having, but still the external hard drive is not recognized by the Navigator software. I contacted WD regarding how to make the unit reformat itself and got no help other than to try installing it again and if that failed to return it as defective.
I have tried at least a dozen times to do a fresh install - having the DVR reboot with the external drive connected and running - nope - no luck on getting the software to see the new drive.
One person that posted to this board said they had reformatted the drive using their PC and then hooked it up and it worked, but my PC does not have an eSATA port and the connector cable from the WD drive is only for an eSATA connector.
So, final result - I am limping along with the Hard Drive that is in the DVR and am not happy either.