According to report, here are different types of connection ports from the fastest to slowest: Thunderbolt (up to 40 Gbps) USB 3.1 (Up to 10 Gbps), then USB 3.0 (about 5 Gbps) eSATA (6 Gbps) FireWire (5 Gbps) Gigabit Ethernet (1 Gbps) USB 2.0 (480 Mbps)