Features:

• Auto backup, USB 2.0 connectivity and 7200 rpm
• $0.20/GB

Buy it: Western Digital My Book Office Edition External 1TB Hard Drive – $200

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Western Digital WDH1U6400N My Book Essential Edition External 640GB Hard Drive – $70 Shipped;

Features:

• 750GB hard drive spinning at 7200 RPMs
• USB 2.0 and 8MB buffer and 3.5-inch form factor

Buy it: Iomega Desktop External 750GB Hard Drive – $120

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Features:

• 500 GB hard drive spinning at 7200 rpms
• USB 2.0 and works with mac or PC
• Buffer cache: 16MB

Buy it: Fantom Drives Titanium-II 500GB External Hard Drive – $60

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