I think they're also known as flash drives but my partner has a 256 MB one & her sister has a larger one. Very handy. So keep in mind they come in different sizes & can be put on neck chains they're so small & very transportable. Here's some examples & links to descriptions http://arstechnica.com/reviews/hardware/flash.ars/1

or this http://www.usbflashdrive.org/

http://en.wikipedia.org/wiki/Flash_drive

http://www.webopedia.com/TERM/U/USB_flash_drive.html

http://www.everythingusb.com/hardwar...ash_Drives.htm

How to use: http://www.library.jcu.edu.au/InfoHe...sbflashdrives/