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Sometimes you either can't afford to buy or carry enough memory.
Professional event photographers with digital SLRs can shoot many
gigs of photos in one day. And what about traveling? Should you
have to carry a laptop computer just to store your photos?
Portable digital storage devices are standalone hard drives that
allow digital photographers to download and reuse their memory cards
in the field. Capacities generally begin at 20 gigabytes and most
are powered by rechargeable batteries. Many have LCDs for still
image viewing and video playback. Images are transferred to your
computer via USB or FireWire connection. If you travel a lot or
find yourself running out of memory regularly, you may want to consider
adding a portable storage device to your camera bag.
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