The E10 uses a smaller microdrive as opposed to the 1.8" HDD formats used in the iRiver Hxx0, Karma and others (It uses a 1.0" HDD IIRC).
As far as I know, there's no connector out there yhat allows for the connection of a 1.0" HDD with a CF card, and given the size of the E10 (In particular, its width and thickness) and the probable size of the connector and a CF card, its not feasible either.
The best they can do is a connector for an external MicroSD/MicroSDHC card to replace the HDD, since I think that even a Mini SD might be stretching it.
As far as I know, there's no connector out there yhat allows for the connection of a 1.0" HDD with a CF card, and given the size of the E10 (In particular, its width and thickness) and the probable size of the connector and a CF card, its not feasible either.
The best they can do is a connector for an external MicroSD/MicroSDHC card to replace the HDD, since I think that even a Mini SD might be stretching it.






