I have a rather new setup.
DELL Inspiron i7, 16GB RAM, 512SSD and 1TB HDD.
Two external drives: Seagate Skyhawk 4TB, Seagate Terascale 4TB
Windows 10.
The external drives are obviously with SATA 6GB/s interface. They are connected to the laptop through an Insignia USB 3.0 docking station...