My Passport Ultra as backup?

I needed a bigger backup device for my 3 TB MyCloud device. I have 2 TB right now and it’s almost full from my backups. So I bought a 3 TB My Passport Ultra.

My question is does the MyCloud keep the connection active 24/7 so the passport drive is spinning constantly? Only reason I ask is I’m not sure if the Passport drive is rated for 24/7 usage. Thought it was meant for quick backups of your computer then you unplug it and store it away.

I use a 4TB My Book always connected to a 3 TB My Cloud. Both of my devices indicate sleep with blinking blue lights.