USB flash drives have read and write speeds that measure in 10x megabytes per second (MB/s), while optical disc read and write speeds measure in 1x MB/s.
USB flash drives are faster than optical drives too. You just take it out of your pocket, pull off the cap, and insert it into your computer's USB port.
A USB flash drive is not as bulky as an optical disc and doesn't require an external case. As you may know, installing an operating system from a USB flash drive is easier and faster than installing it from an optical disc.
