It would be much easier and cheaper to just get an external hdd, But it is probably a standard laptop 2.5 inch hdd. Get the model number from the post screen or the bios, then look it up. Alot of oem's cover the post screen with a splash screen of their name most of the time the tab key will show the post or the splash screen will say what key to hit. If not,,,,,mash the keyboard.
It should be
something like this