My 2 cents.... ok 80GB is tiny these days but it's still enough to store hundreds of thousands of styles and midi files. The keyboards only has 64MB of sample RAM too so it's not like that's going to use up much HDD space either.

So really why would you need any more HDD space considering the limitations of the keyboard. Other than the Audio Styles, the end user files are not exactly going to use up much space. I'd be surprised if the end user even manages to put 1GB of data on the drive.

Regards
James