Can it be used for a small mSATA SSD (of course, I will loose WIFI)? I know that all PCI-e ports are not suitable for mSATA. And some SSD cards are suitable for PCI-e.
So I wonder if anyone here tested an mSATA card in the Archer C7?
I'm not sure what you're trying to accomplish but keep in mind that the SoC itself is pretty slow so I doubt you'll see much of an improvement compared to USB.
On that note, the two usb ports actually connect to a hub. Also, SATA is always faster and you will see an improvement on an archer c7. USB also takes a large amount of CPU when writing to the hard drive. It's implemented weird I think.