Usb DVD drive

I have 3 usb DVD drives.

I use them for my laptop and other devices.

Question?

Can I plug in a usb DVD drive into my WD Hub and play dvds thru the Hub?

or

Do I need to a usb adapter cable to view my DVDs thru the Hub?

I guess

The usb adapter cable might have to be a micro computer.

I might be a little to soon on this.

but

I have been reading about Japan producing credit card size computers.

No.