One of the trendiest gadgets among the geek set as of late has been the key chain hard drive.
In truth, they're not hard drives at all but, rather, flash memory chips that can store data even after their power supply has been turned of. But they're small enough to fit on a key chain and, when plugged into the USB port of a PC or Mac computer, they act like a small hard drive and store files that you can carry around easily.
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