why bother with detail for the old ports. If you really need to know, the pc manual should advise.
You do not state laptop, desktop, make, model.
For a desktop, here in the UK a usb2 card costs around £5 - 6. They come in various configurations. e.g. 4 external and 2 internal usb ports.
Would advise against a unpowered hub as all too often they do not work.
Why connect a usb3 hub to a usb2 port?
and with 4 or more external ports do you need one?
Please advise back what you decide.
Good Luck - Keep us posted.