My family has a long history of losing files (Old family photo's, Work notes) and i want to build a 3TB home NAS out of a DELL optiplex 960 SFF by replacing the HDD with a 3TB drive and then using amahi. I am wondering if i should upgrade my under-powered GPU (Nvidia Geforce GTX 580) and replace it with AMD Radeon RX 480 or help my family and build a local NAS.