Category C (Class 2) LGV / HGV training runs around Ipswich, Suffolk and uses the DVSA Test Centre in Ipswich. C is the category that allows you to drive a rigid vehicle over 3,500kg.
USB 2.0 is much faster than the DVD data rate. DVD 1x (slowest) write speed is 1.39MB/s. DVD 24x (fastest) write speed is 33.24MB/s. USB 2.0 write speed is up to 35MB/s. A 24x DVD max is about 32MB/s while USB2 max is about 60MB/s.
USB 2.0 is rated at 480Mbps. For quick reference, 1000Mbps equals 1Gbps. The USB 3.0 connection type is the next step for USB (from 2.0). USB 3.0 transfer speeds are figured to be 10x faster than previous USB 2.0 speeds.