If you decide to add a usb hub for external devices such as hard drives or dvd drives it is always best to get a hub that has it's own power supply. Adding unpowered usb hubs can cause problems with external HDD and data loss, if you are pulling to much power from the port it is attached to.
More Info on usb power problems in the following link.
https://community.wd.com/t/how-to-elimin...althy/7709
More Info on usb power problems in the following link.
https://community.wd.com/t/how-to-elimin...althy/7709
“I have not failed. I’ve just found 10,000 ways that won’t work.” - Thomas Edison