Drives (HDD, SSD, Network-attached storage)

Model		Average cost, USD ($)	Popularity
	Western Digital WD Scorpio Blue 320 GB (WD3200BEVT) HDD 2.5", 320Gb, for notebook (laptop)	112	0.6/10
	Western Digital WD AV-GP 3 TB (WD30EURX) HDD 3.5", 3Tb, for server	198	0.6/10
	Western Digital WD RE4 500 GB (WD5003ABYX) HDD 3.5", 500Gb, for server	64	0.6/10
	Western Digital Desktop Performance 2 TB (WDBSLA0020HNC) HDD 3.5", 2Tb, for PC	324	0.6/10
	Western Digital WD NAS 4 TB (WDBMMA0040HNC) HDD 3.5", 4Tb, for server	375	0.6/10
	Western Digital WD Surveillance Storage 2 TB (WDBGKN0020HNC) HDD 3.5", 2Tb, for server	265	0.6/10
	Western Digital WD Scorpio Black 500 GB (WD5000BEKT) HDD 2.5", 500Gb, for notebook (laptop)	34	0.6/10
	Western Digital Desktop Performance 4 TB (WDBSLA0040HNC) HDD 3.5", 4Tb, for PC	328	0.6/10
	Western Digital WD Caviar Green 1 TB (WD10EADS) HDD 3.5", 1Tb, for PC	151	0.6/10
	Western Digital WD VelociRaptor 1 TB (WD1000DHTZ) HDD 3.5", 1Tb, for server	274	0.6/10

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