I'm now at 3 WD 750 drives. #1 IMDB 8.1 or higher, #2 IMDB movies lower, #3 specials and series. They work well but I'm not sure the transfer rate is the best possible. The initial estimate of time gets raised 10 to 50% in a few minutes after it gets a sample of the rate--it does not remember the factor.
It sure is easier to store SD and MPEG-4 than MPEG-2 or OTA because there are less bytes. Say about 1:3:5:6.
It would be nice:
if the showed the space on both drives and not just the external,
if you got the full header on the external so you could check the date, etc.,
if you could remain at the same place on the list when you issue done or cancel,
if we had folders,
if we had an episode or initial show date sort option, and so on.
(The last for series like Arrested Dev., Northern Exposure, or Futurama.)
-Ken