There is no auto-save in the 2005 original. You must manually locate Typewriters scattered throughout the world. Find a Typewriter

: You cannot delete save files from within the game menu. To delete a file, you must use the GameCube's internal Memory Card Manager by holding the 'A' button while powering on the console without a disc inserted. Memory Card Requirements Resident Evil 4 Save Game Files for GameCube - GameFAQs