flash driver

1. others

1.1. Comparison with other portable storage

1.1.1. Floppy disk

1.1.2. Optical media

1.1.3. Flash memory cards

2. ref

2.1. http://en.wikipedia.org/wiki/USB_flash_drive

3. Background

3.1. Historty

3.1.1. the first USB flash drives~year 2000

3.1.2. USB 2.0

3.1.3. USB 3.0

3.2. Technology

4. usage

4.1. Adv.

4.1.1. small of size

4.1.2. high of file transfer speeds

4.1.3. Booting operating systems

4.1.4. Most personal computers support

4.2. Disadv

4.2.1. a limited number of write and erase cycles before the drive fails

4.2.2. easily misplaced

4.2.3. more expensive per unit of storage than large hard drives