depends on what files you want to store and where. if you just want to run the OS on the SSD, and keep the rest of your games, media, and others files on the HDD, then go that way. or if you want to do SSD all the way, start with what you need, then you can always change out or add on later. you can always get external hard drives too as well. along with cloud storage being another option with various services. like google drive, carbonite, or others.