I just finished my first ever PC build the other day only to realise that my HDD has not been detected by windows and everything has been installed on my SSD (which is fine) but I need my HDD to operate as well since all my old files from my old PC are on there. Everything is connected up properly its a 3.5" drive and every required cable is connected. Ive plugged it into the SATA 3 port on my mobo which is the right one and it doesnt show up (tried sata 2 just in case).