![Amazon.com: WD Purple 6TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD60PURX [Old Version] : Electronics Amazon.com: WD Purple 6TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD60PURX [Old Version] : Electronics](https://m.media-amazon.com/images/I/71t6bi2CdOL.jpg)
Amazon.com: WD Purple 6TB Surveillance Hard Disk Drive - 5400 RPM Class SATA 6 Gb/s 64MB Cache 3.5 Inch - WD60PURX [Old Version] : Electronics
![Seagate SkyHawk 6TB Surveillance Hard Drive - SATA 6Gb/s 64MB Cache 3.5-Inch Internal Drive (ST6000VX0023) Seagate SkyHawk 6TB Surveillance Hard Drive - SATA 6Gb/s 64MB Cache 3.5-Inch Internal Drive (ST6000VX0023)](https://amcrest.com/media/catalog/product/cache/9b35a097e336151214b669c0ac2cd5a5/h/d/hdd6tb-st_2_1_1.jpg)
Seagate SkyHawk 6TB Surveillance Hard Drive - SATA 6Gb/s 64MB Cache 3.5-Inch Internal Drive (ST6000VX0023)
![Amazon.com: Western Digital 6TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD60PURZ : Electronics Amazon.com: Western Digital 6TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD60PURZ : Electronics](https://m.media-amazon.com/images/I/81-Pu8Hyy2L.jpg)
Amazon.com: Western Digital 6TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 64 MB Cache, 3.5" - WD60PURZ : Electronics
![Tomshine Purple 6TB HDD 3.5 inch WD60EJRX 5400RPM 64MB Cache SATA Mechanical Hard Drive for 24*7 Video Recording - Walmart.com Tomshine Purple 6TB HDD 3.5 inch WD60EJRX 5400RPM 64MB Cache SATA Mechanical Hard Drive for 24*7 Video Recording - Walmart.com](https://i5.walmartimages.com/asr/8597e26a-d277-43b2-ae27-01cebf13c65c.730d15c6ed3eedb8ea709edcdecbf593.jpeg)