12 MB is about the best one can expect even on an empty hub.
Agree w/Tony. !2MB/s or less is pretty typical from a USB2 to USB2 device, either in a 100mbps wired network, or even a gigabit system. USB2 is the limiting factor. Has nothing to do with a bleeping machine. On the other hand, I get around 30MB/s from the PC to a USB3 drive through a gigabit wired network.
If I remember correctly from reading here in the past, its more of a limitation of the the CPU on this, rather than the port itself.
Either way, wife says I cannot take it appart, till we have the money to replace it if I screw up, lol.
It doesn’t matter if there is a WD player in the mix at all – USB speeds are what they are, and 3 is faster than 2…
Guess we all know who calls the shots at your house! 
LOL yup.
But the hub doesn’t have USB3, only USB2, so that doesn’t really help in this matter.
