Cassette tapes, floppy disks, zip drives, CD's and even external hard drives (and variants thereof) have all been used to transport essential (or even non-essential) data from one PC to another. Yet these mediums have all suffered certain drawbacks:

• Cassettes are slow, sequential in data retrieval, and are easily subject to magnetic corruption. Cassettes also contain moving parts.
• Floppies are slow, unreliable, and are also easily subject to magnetic corruption. Floppies also contain moving parts.
• Zip drives are essentially larger, more costly floppy disks that not only are subject to the frailties of regular floppy disks, but they also rely upon a special drive (that not everyone would have).
• CD's take time to write to (burn), and can easily get scratched during transport. Some CD players won't read certain types/kinds of CD-R's, if at all.
• External hard drives have proven bulky and cumbersome. They are also susceptible to magnetic interference, and contain moving parts.

• No moving parts
• Plug-n-Play compatible
• More available space than cassettes, floppy disks, zip disks, and CD's
• Extremely small size

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