There are 2 x philips screws, securing the HDD Caddy Case. Remove them and slide the HDD to disconnect it from the SATA Connector.

The Caddy Case is held to the HDD by 4x Phillips screws. Remove them and separate the HDD from the case.

After installing the new HDD you must install a new OS or clone your old HDD.

You can install SATA HDD, 2.5" up to 1TB.

Did you do it successfully?