 "WD Purple WD10PURX 1TB Surveillance 3.5" Internal SATA Hard Drive"
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                Overview:
The 1TB Purple Surveillance Internal Hard Drive from Western Digital is designed to withstand the stresses placed on it in a 24/7 surveillance system. With support for up to 32 high-definition surveillance cameras this 1TB hard drive can hold a large amount of data and gives you the ability to easily upgrade and expand your security system.

Built for always-on surveillance storage applications
AllFrame technology for reduced pixilation and video interruption
Designed to support up to 32 HD cameras
Caching algorithms specifically designed for security surveillance operation
1 TB capacity holds up to 200,000 digital photos, 250,000 MP3 files, and 120 hours of HD video.

Specifications:

1TB Storage Capacity
3.5 Form Factor
6 Gb/s Data Transfer Rate
64MB Cache
Surveillance Class Storage
Supports up to 32HD Surveillance Cameras

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 "HDD BLCK 6TB 3 5 SATA3 128MB 7200" 7200 | Tradineur.com"
"Capacidad: 6.000 GB; Interfaz: SATA III; Tamaño: 3,500 "; Buffer: 128 Mb; Velocidad de rotación: 7.200 rpm" 
 Peso 0.7900 Alto 5.00 Ancho 13.50 Profundo 20.50 Fabricante WESTERN DIGITAL Ref. proveedor WD6001FZWX Marca WESTERN DIGITAL