Got a new computer with Windows 10 on internal hard drive. When I boot up with my My Book 4TB drive plugged into USB, the computer hangs up on the Dell boot screen and goes no further. Boots just fine if I disconnect the external drive.
In BIOS I removed USB from the boot sequence, so that’s not the issue. I don’t know why the computer is even looking at the USB drive when booting.
Had the same exact setup on my last PC and never had an issue.