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What is the difference between the WD Colours – Blue, Red, Black, Green, Purple and Gold – NAS Compares
![WD Purple 1TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD10PURZ - Walmart.com WD Purple 1TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD10PURZ - Walmart.com](https://i5.walmartimages.com/asr/74e6f846-00db-4f8e-97db-920436decfef_2.caf398f0e7ef7619d29c6980f49c4266.jpeg)
WD Purple 1TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD10PURZ - Walmart.com
![Amazon.com: Western Digital 1TB WD Blue PC Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 64 MB Cache, 3.5" - WD10EZEX : Electronics Amazon.com: Western Digital 1TB WD Blue PC Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 64 MB Cache, 3.5" - WD10EZEX : Electronics](https://m.media-amazon.com/images/I/61fiQSb2-hS.jpg)
Amazon.com: Western Digital 1TB WD Blue PC Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 64 MB Cache, 3.5" - WD10EZEX : Electronics
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