Available Capacities:
128MB Cache 5640 RPM
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8TB (WD80EFZZ) $129.99
256MB Cache 5400 RPM
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4TB (WD40EFPX) $79.99
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6TB (WD60EFPX) $99.99
256MB Cache 7200 RPM
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10TB (WD101EFBX) $159.99
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Newegg also has 10TB Western Digital WD Red Plus 3.5" NAS Internal Hard Drive (WD101EFBX0) on sale for $159.99. Shipping is free.