Transferring from one external drive to the other, USB options?

[Photogd]

Transferring from one external drive to the other, what is faster: One drive as USB 2.0 and the other as USB 3.0, or both drives on the same USB 3.0 port, split on a USB 3.0 HUB? (I only have one USB 3.0 port in my actual computer.) Is it even possible to transfer files between 2 devices on same usb port/hub?

I'm transferring files from a 3TB External HDD to a 16TB External HDD and the 3TB of files seems to be going pretty slow, about 5 Mb/s. Windows estimates about 3 days left on the transfer. I have the originator HDD plugged into a USB 2.0 port and the receiving HDD plugged into a USB 3.0 port. Would it speed it up by much if I plugged both into my USB 3.0 HUB, sharing one real port on the computer? Would the computer even recognize both devices?

Note: I had two USB 3.0 ports originally but one broke and is loose on my motherboard, that's why I only have one now.

 

[boosted1g]

If both drives are usb 3.0 drives then using a usb 3.09 hub would be faster

USB 2.0 is 480mbps or 60MBPS approximatly. Hard drive can go 100-120MBPS.
Thus using usb 2.0 will bottleneck the hard drive to the 60mbps speed.