The original (320GB to 4TB) worked fine.
Then I got lazy and used the same SOURCE to copy to (2) 1TB HDs.
But the (2) remaining Premieres refused to TRANSFER recordings no matter what hoops I and they jumped through.
Wasted HOURS.
Finally I did use MFSTOOLS on EACH original HD (which I had kept) to copy to EACH of the (2) 1TB HDs, and everything works.
Somehow the Original HD contains critical...
KEEP your original HD !!!!
KEEP your original HD !!!!