Well i got the same problem as other but i dont even see my HDD when i go to This PC>Devices and drives i only see my SSD. got my HDD with power and sata cabel ofcourse, but on disk manager he can see it, at the last: on Disk management he sees it aswell but Unknown that is were the error is: the request could not be performed because of an i/o device error (when i want to initialize the disk. please help me