How to restart computer after backup

I connected My Passport Ultra to my laptop. I think it is set to backup automatically every
Sunday night. After it had been connected several hours, my computer screen only gives me the option of setup or boot. All I want to do is restart my computer.

Hi, what operating system you have? Is the computer off and you are trying to boot? Have you disconnected the drive from the computer before restarting?

Disconnecting the drive seems to have fixed it. Thanks