types of usb ports ss
Transfer speed â USB 3.0 adds a new transfer type called SuperSpeed or SS, 5 Gbit/s (electrically, it is more similar to PCI Express 2.0 and SATA than USB 2.0) Increased bandwidth â instead of one-way communication, USB 3.0 uses two unidirectional data paths: one to receive data and the other to transmit.