The hard disk drive in your computer is magnetic so it retains its data without the need for power. Once data is recorded onto the hard drive, you can power down with everything saved. Many of today's consumer electronic products use flash memory. Flash memory unlike regular computer memory doesn't forget data when the power goes off. One of the first to use flash memory was the digital camera.
Digital cameras use computer memory instead of film to hold their images.
Most of them use flash memory to retain the images so that in the event that your camera's batteries die, you won't lose the images already taken. Using its built in clip or ring, the Flash USB Drive literally clips into a shirt pocket or can be attached to a key chain . The included neck strap lets you wear it around your neck to make a techno fashion statement. About half the length of a pen and about twice as thick, the silver finished Flash USB Drive weighs in at a little over an ounce. JMTek wants you to think of it's little device as a hard drive without the moving parts that requires no cable, batteries nor any software.