Storing your photos may not seem a big problem, unless you decide for a long travel with your photo camera. While modern memory cards can hold thousands of JPG files, having the same amount of RAW data may put you in trouble.
Of course, you can take a laptop with you, but for a number of situations it may appear too large and heavy. One of the solutions is a portable storage device, which is independent. In other words, one that does not require a computer to transfer data to it.
A really interesting solution is a Sanho HyperDrive COLORSPACE UDMA 2 Multimedia Storage