Key Specs
- Storage Drive Type: HDD (Traditional, mechanical hard disk drives are the most common type of storage because they're relatively inexpensive and offer huge capacities. However, they also generate both noise and heat. Solid state drives, also known as SSDs, are many times faster than hard disk drives and have no moving parts to wear out, but typically offer less capacity for the same price.)
- Interface(s): SATA (Refers to the types of connections that devices use to interact and communicate with each other.)
General
- Product Name: Purple 4TB Internal Serial ATA Hard Drive (OEM/Bare Drive)
- Brand: WD
- Model Number: WD40PURX
Performance
- Storage Drive Type: HDD (Traditional, mechanical hard disk drives are the most common type of storage because they're relatively inexpensive and offer huge capacities. However, they also generate both noise and heat. Solid state drives, also known as SSDs, are many times faster than hard disk drives and have no moving parts to wear out, but typically offer less capacity for the same price.)
Compatibility
- Internal Or External: Internal
- Interface(s): SATA (Refers to the types of connections that devices use to interact and communicate with each other.)
Memory
- Cache Buffer Size: 64 megabytes (The data capacity of the cache buffer (or disk buffer) that acts as temporary memory for the drive. The cache holds the most recently and frequently used data to save the drive the extra step of pulling it from permanent storage every time it's needed, which helps increase the drive's overall speed.)
Dimensions
- Product Height: 1.03 inches (The out of box height of the item. Height is measured as the vertical distance from the bottom of the item to the top as it would be primarily used or placed.)
- Product Width: 4 inches (The out of box width of the item. Width is measured as the horizontal distance from one side of the item to the other as it would be primarily used or placed.)
- Product Weight: 24 ounces (The out of box weight of the item.)
Other
- UPC: 718037823317

This WD Purple WD40PURX hard drive features 4TB of storage capacity that can be used in select 24/7 surveillance systems with up to 8 bays and 32 HD cameras. AllFrame technology works with ATA streaming to improve playback and reduce video frame losses.

4TB capacity: Provides the space you need to store video surveillance footage from 24/7 monitoring systems.
Serial ATA interface: Enables flexible connection. Suitable for use in systems with up to 64 HD cameras.
Data transfer rates up to 6 Gbps: Allow you to move or update files quickly. Caching algorithms are designed for write-intensive, low-bit-rate applications that are often used in surveillance systems.
AllFrame technology: Works with ATA streaming to minimize frame loss, increase the number of drive bays supported and improve playback for efficiency.