Full-duplex data transmission. In addition to the four main lines, USB 3.0 adds two additional lines: one for transmitting data and one for receiving data. This means USB 3.0 can perform simultaneous read and write operations at full speed.. USB 3.0, also known as SuperSpeed USB, boasts ultra-fast transfer speeds, significantly increasing bandwidth. Full-duplex transmission can reach up to 5Gbps (625MB/s), but the actual transfer rate is approximately 3.2G bps (400MB/s).. USB 2.0 operates at half-duplex speeds of 480Mbps (60MB/s). USB 3.0 can transfer large files (such as high-definition movies) at the storage rate defined by the storage device.. For example, a flash drive using USB 3.0 can transfer 1GB of data to a host computer in 15 seconds, compared to 43 seconds using USB 2.0.. Supports USB 3.0 (5Gbps), and is compatible with USB 2.0 (480Mbps) and USB 1.1 (12Mbps) specifications.