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.
DVD drives spin the disk faster and read the data faster than a normal CD-ROM drive, so you canât fairly compare the speeds using X ratings alone. Recall from my Daily Drill Down âAll About CD-ROMâ that CD-ROM speed is measured in relation to the original 1X standard of 150-Kbps data transfer rate.