They both mean the same. Actually a flash drive also called as a pen drive is an USB device ( Universal serial bus). This is called so because, the flash drives are attached with the computer at the...
Yes. Flash drives work just as well in reading memory as a CD or your hard drive. Plus, flash drives have a tendency to read faster than hard drives, so it may load faster.
The difference is the USB part. Some Flash Drives are USB, some are PS2 Port capable, the word Flash Drive is a rounded name for any Drive capable of information being put on it. The USB Flash Drive...