Returned my 320GB drive that I bought locally and ordered a 750Gb online. I received it yesterday and installed it and everything seems to be working well. Diag R reads 665.9 free space internal temp 30. All I can say is WOW.
A note to those who may be like me and try to pull back on the cover to remove it after removing the screws do not try. The cover needs to be lifted straight up to disengage the front.
Will post again when have more recordings on hard drive.