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.
Using a RAID or Disk Array. You can improve the transfer speed of individual disks by configuring multiple disk drives in a disk array. In a Redundant Array of Independent Disks (RAID), multiple SCSI, ATA, or FireWire disk drives are grouped together via hardware or software and treated as a single data storage unit.