1. A method of presenting a user with settings of a plurality of adjustable parameters on an electronic visual display, where at least one user selected adjustable parameter setting is applicable to caching a converted form of a digital data work in a temporary storage provided in a non-volatile memory, to enable a later, selective apparent rapid conversion of the converted digital data work to a playable form that is available in a visible store, said storage occurring during play of the digital data work stored on a removable digital medium, the method comprising the steps of: (a) providing a plurality of user adjustable parameter settings in the electronic visual display, said parameter settings controlling how much of an available non-volatile memory is used for the temporary storage of converted digital data works; (b) enabling the user to select at least one of the plurality of adjustable parameter settings in the visual display for adjustment; (c) enabling the user to selectively set the adjustable parameter setting that was selected; and (d) responding to the user setting the adjustable parameter setting that was selected and set, so that the setting affects how much of an available non-volatile memory is used for the temporary storage of the converted digital data works.