When you have your backup manager installed,i use gaia,open manager 2.1 and the jailbreak backup manager you will be able to attach a external hdd,make sure you it is formatted to fat 32,make a file called GAMEZ on it and put some games on,there is a compatibility list you can google for it.some larger games will have to be ftp to the internal drive of the ps3.All i can say is with your games connect a external to the usb port with the file i said,open your backup manager and backup your game,it will be trial and error as to which go where,if it offers to the internal first hdd0 just click no and you should then be presented with the option to backup to the external or vice versa,uncharted went to my internal,assasins went to external