The same way having an internal and external drive works. You can access data on both drives simultaneously.self explanatory... wouldn't you only be able to use one at a time??
so put the OS on SSD, how would you do that btw, and use the HDD for storage. But it wouldn't be as slow as an external right since its on the inside?
It is not limited by some slow IO port but it is not really much faster. Connected via USB3.0 or Thunderbolt is as fast. Just Apple notebooks only have the slow IO ports like USB 2.0 and FW800 which also limits somewhat.But it wouldn't be as slow as an external right since its on the inside?