Hi there, I recently picked up a WD 10tb drive as I was hoping to retire at least one of my older legacy drives. I received the drive and copied across everything I wanted onto the new drive leaving nothing on my old 1tb Seagate drive. My system drive (with windows installed) is a Samsung SSD, so I didn't think i would have any problems when I unplugged the 1tb Seagate drive, but with it unplugged the PC won't boot. I have checked and double checked in the bios and I am sure it is set to boot from the Samsung. There is also nothing on the Seagate but the machine refuses to boot unless it is connected. Anyone any ideas? Thanks.