WDMycloud 4tb External USB...power required?

Hi, I have had a 2tb hooked up to the usb port on my 4tb Wdmycloud drive, I wanted to get a 4tb, but can the wdmycloud power a 4tb drive that doesn’t have it’s own power supply? Thanks.

It’s a USB3.0 port … so it will power a USB3.0 Hard drive.

Thanks my 2tb has a power brick so I wasn’t sure if I needed a drive with/without a brick