Place your replacement hard drive or solid-state drive into the caddy. Make sure the drive is upside with the connector's golden pins facing up like so.
When replacing the hard drive, you can use a standard SATA II hard drive or use a solid state (flash) drive no thicker than 9.5mm. As of the 4.5 system update, ...
Unscrew the four screws holding the drive in place and replace it with your SSD. Once you have put your SSD into the console, close it all up and plug it back ...