Hey there. So I just got done building my first PC and it runs amazingly, but my 1TB internal drive I have installed is filling up quickly with Steam games and various school documents and my SSD with Windows 7 is strictly for applications. I was wondering if I could take my 3TB Seagate External Hard Drive (bought it external about 3 years ago) and open the case and use it as an internal drive. My main concern was will it run off standard SATA ports. The reason I ask is I opened up a 300GB external WD drive and it had no SATA connectors, only the MicroUSB that it normally connected to, but this was 7 years old. So if I open the case, should I be able to easily just screw it and connect it to my computer and format it and be ready to go? Thanks for the help!