RS720 - Can I connect to the RS720 from the SFP port on my router, or PC?

What is USB 3.0 SFP exactly, is it open source, is it network protocol?

Can I connect to the RS720 from the SFP port on my router, or PC?

The RSA720 can only be connected to the RS130 directly.
The switch is of no use in this case.