My pc works just fine and I want to add old external HDD in to my PC. It didn't work at all even in BIOS didn't detect any new drive plug in. So I try putting it back to External and it work perfectly fine!?! All SATA cable is new and is working just fine, all SATA slot is useable ( tried with the working C drive in every SATA slot and cable) so it has to be the setting somewhere right? What's wrong with my PC?