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What would be an ideal minimum size hard drive for a system running an Avtech KPD 674? It will have 2 cameras and will be running mainly at night and when the house is not occupied during the day.



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Generally, the smallest SATA HDD you'll see on the market today is 160GB. From there the most common sizes you'll see are 250GB, 320GB, 500GB, 750GB, 1TB, 1.5TB, 2TB, 3TB.


The cost difference between a 160GB and a 500GB HDD can be just $10-$20, so it doesn't really make sense to go with a lower capacity HDD when you look at it from a cost per GB basis.


In Sept/Oct 2011 HDD prices skyrocketed due to flooding in Thailand. I think 30% of the worlds HDD factories were shut down. The prices have started to come back to where there were before the flooding and you can now get a quality 500GB HDD for $80-$85.

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