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.
On paper, at least, Thunderbolt does beat USB. Thunderbolt offers a 10Gbps transfer rate, compared with SuperSpeed USB's 5Gbps. Thunderbolt is 12 times faster than FireWire 800 and up to 20 times faster than USB 2.0. Thunderbolt can transfer a full-length, high-definition movie in less than 30 seconds.