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 1.1 could transfer data at 12 Mbit/s. That is 1.4 Megabytes per second. Back in the day when a floppy disk could hold 1.4 Megabytes, that was fast. USB 2.0 was released in 2000, sporting a theoretical throughput of 480 Mbit/s. However, practically it works at 280 Mbit/s, which is around 35 Megabytes per second.