I am using a 1 TB HDD inside my Q10 Pro. There is not much you must do, just follow @stl instructions. About the brand, I would recommend a good Seagate HDD. Western Digital is a big NO. Samsung HDDs are ok, I guess. I would buy a Seagate HDD based on the information from a colleague, but a good HDD, not the cheapest one. I am actually using a 2.5 inches HDD inside my Q10 Pro that I rescued from an external HDD.