All HR24's have the same 500GB size hard drive (if they haven't been altered by a 3rd party vendor).gator1234 said:
The 400 refers to the hours of HD content it can record on the drive (which is equivalent across the board on the HR24).
The difference between the last numbers after the dash refer to the manufacturer and are as follows:
-100 Thomson
-200 Samsung
-300 Philips
-400 Hughes
-500 Humax
-600 LG
-700 Pace
-800 NEC