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 6TB WD Purple Surveillance Internal Hard Drive HDD - SATA 6 Gb/s, 256 MB Cache, 3.5" - WD64PURZ

Product ID: 534968190

Details

Brand
Western
Color
Purple
Compatible Devices
Desktop
Connectivity Technology
SATA
Digital Storage Capacity
6000 GB
Hard Disk Description
Mechanical

⚡SATA 6 Gb/s interface speed

💾6TB storage capacity

🛡️256 MB cache for smooth data flow

€ 647.97

Duties & taxes included

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎥 Capture every moment, never miss a frame with WD Purple Power!

MASSIVE 6 TB CAPACITY - Store months of high-definition footage without compromise
HIGH SPEED SATA 6 GB S - Seamless data transfer for real-time surveillance demands
ALL FRAME TECH ADVANTAGE - Reduces frame loss and ensures flawless HD video playback every time
SCALABLE MULTI BAY SUPPORT - Supports up to 16 bays, perfect for expanding security setups
SURVEILLANCE GRADE ENDURANCE - Built for 24/7 nonstop video recording with enhanced heat & vibration resistance

The Western Digital 6TB WD Purple HDD is a surveillance-optimized internal hard drive designed for 24/7 operation in demanding NVR environments. Featuring SATA 6 Gb/s connectivity, 256 MB cache, and WD AllFrame technology, it delivers reliable, high-capacity storage with reduced frame loss and enhanced heat and vibration tolerance—ideal for professional-grade video security systems.

Specifications

ASIN	B0C4WTF5N2
Additional Features	Engineered for 24/7 surveillance environments with enhanced heat and vibration tolerance
Best Sellers Rank	#4 in Internal Hard Drives
Brand	Western Digital
Built-In Media	Internal Hard Drive
Cache Memory Installed Size	256
Color	Purple
Compatible Devices	Desktop
Connectivity Technology	SATA
Customer Package Type	Standard Packaging
Customer Reviews	4.3 4.3 out of 5 stars (1,788)
Digital Storage Capacity	6000 GB
Enclosure Material	Aluminum
Form Factor	3.5-inch
Global Trade Identification Number	00718037898339
Hard Disk Description	Mechanical Hard Disk
Hard Disk Form Factor	3.5 inches
Hard Disk Interface	Serial ATA-600
Hard Disk Rotational Speed	5400 rpm
Hard-Drive Size	6 TB
Hardware Connectivity	SATA 6.0 Gb/s
Hardware Platform	WD
Installation Type	Internal Hard Drive
Item Dimensions L x W x Thickness	9.3"L x 6.8"W x 3.3"Th
Item Type Name	Internal Hard Drive
Item Weight	1.3 pounds
Manufacturer	Western Digital Technologies, Inc.
Media Speed	180 MB/s
Mfr Part Number	WD64PURZ-SPBWUY0
Model Name	WD Purple HDD
Model Number	WD64PURZ-SPBWUY0
Number of Items	1
Read Speed	180 megabytes_per_second
Specific Uses For Product	Business
UPC	718037898339
Unit Count	1 Count
Warranty Description	3 Year Limited Warranty

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