can it replace older hhd in nightowl dvr

Yes. This hard drive is compatible with all recording units.

What is the difference between 3tb purple wd30purz and wd30purz, very confusing?

Absolutely nothing. They are the same.

Is this compatible with annke surveillance camera system 8ch 1080p lite h.264+ dvr with (8) hd 1080p outdoor weatherproof cameras cctv security camera

As the owner of South Jersey Surveillance Systems, I can assure you that any WD purple or Seagate Skyhawk hard drive is the appropriate type of storage drive for any and all DVRs and NVRs.

Whats the difference between this and the red plus?

WD Blue HDDs are mainly used for general purpose storage, they are great all-rounders, and an average user can’t go wrong with Blue. WD Green is basically same as Blue, but it lacks a bit of performance. However, it is the most eco-friendly HDD, and it’s quite cheap. WD Blacks are for pure performance including gaming, media, and content creation. Also one of the most expensive HDDs. WD Red is a NAS drive. It’s optimized for NAS systems. WD Purple is for surveillance. Advised for 24/7 operation. WD Gold, probably the most premium of all. Made for a multitude of Datacenter-specific applications.

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WESTERN DIGITAL 4TB Hard Drive for CCTV Surveillance, Purple

Product ID: 253289811

Details

Brand
WD
Colour
Purple
Compatible devices
Camera
Connectivity technology
SATA
Digital storage capacity
4 TB
Hard disk description
Mechanical and

⚡5000 Mbps ultra-fast transfer

💾4TB massive storage

🛡️Data Recovery Service included

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€ 366.86

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💜 Secure your world with WD Purple — where surveillance meets unstoppable storage.

MASSIVE 4 TB CAPACITY - Store months of high-res CCTV footage without compromise.
OPTIMIZED FOR SURVEILLANCE - Built with IntelliSeek tech for reliable 24/7 operation under heavy workloads.
PEACE OF MIND DATA RECOVERY - Includes WD’s trusted Data Recovery Service to safeguard your critical footage.
ROBUST SATA 6 0 GB S INTERFACE - Ensures stable, high-speed connectivity for professional setups.
BLAZING 5000 MBPS TRANSFER SPEED - Seamlessly handle continuous video streams with zero lag.

The Western Digital 4TB Purple Hard Drive is a 3.5-inch internal SATA drive engineered specifically for CCTV surveillance systems. Featuring a massive 4TB capacity, 5000 Mbps data transfer rate, and IntelliSeek technology, it delivers reliable, high-performance storage optimized for continuous video recording. With a 64MB cache, aluminum enclosure, and a 2-year warranty, it also includes WD’s Data Recovery Service, making it a trusted choice for professional and personal security needs.

Specifications

ASIN	B071KVB4F8
Additional Features	Data Recovery Service
Best Sellers Rank	#6,814 in Computers ( See Top 100 in Computers ) #18 in Internal Hard Drives
Brand	WD
Built-In Media	hard drive
Cache Memory Installed Size	64
Color	Purple
Compatible Devices	Camera
Connectivity Technology	SATA
Customer Package Type	Standard Packaging
Customer Reviews	4.4 4.4 out of 5 stars (4,291)
Data Transfer Rate	5000 Megabits Per Second
Digital Storage Capacity	4 TB
EU Spare Part Availability Duration	3 Years
Enclosure Material	Aluminum
Form Factor	3.5-inch
Global Trade Identification Number	00718037856773
Hard Disk Average Latency	5.56 Milliseconds
Hard Disk Description	Mechanical Surveillance Hard Drive with High Workload Rating and IntelliSeek Technology
Hard Disk Form Factor	3.5 Inches
Hard Disk Interface	Serial ATA
Hard-Drive Size	4000 GB
Hardware Connectivity	SATA 6.0 Gb/s
Installation Type	Internal Hard Drive
Item Dimensions L x W x Thickness	37.3L x 25.8W x 6.6Th centimeters
Item Type Name	Wd Purple 4Tb For Cctv Surveliance
Item Weight	1.5 Pounds
Manufacturer	Western Digital
Mfr Part Number	WD40PURZ
Model Name	WD 4TB PURPLE
Model Number	WD40PURZ
Number of Items	1
Specific Uses For Product	business, personal
UPC	718037856773
Unit Count	17.6 Ounce
Warranty Description	2 years

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