Brand: Western Digital | Hard Drives Western Digital Hard Drives Western Digital Red 3.5" 4000 GB Serial ATA III

Western Digital Red 3.5" 4000 GB Serial ATA III WD40EFRX

We Price Match!
If you have seen this product cheaper, we would love to try and match or better the price.  Click here to submit a price match.
All prices include VAT
+ Free UK Delivery
- WAS -
Save £42.29 (26%)
RRP £162.99

Sorry, temporarily out of stock, click the button below to be notified once it's available again.

Other products we think you might like.
Information from the manufacturer
WD RED FOR HOME Stream, backup, organize and effortlessly share your digital content to your TV, PC and more. NASware technology increases your drives' compatibility with your NAS system, for better playback with your devices.WD RED FOR SMALL BUSINESS Businesses thrive on productivity and efficiency, two guiding principles built into the design of the WD Red drive. Share and backup files at the speed of your business with a WD Red drive in your NAS.WD RED FOR BIG BUSINESS Looking for maximum performance in a heavy use NAS? The WD Red Pro drive is designed to handle an increase in workload and system demand and features a 5-year limited warranty.DESIGNED FOR NAS Desktop drives aren't purpose-built for NAS. But WD Red drives with NASware 3.0 are. Our exclusive technology takes the guesswork out of selecting a drive. We can help you find the perfect storage for your NAS system.
View more information on this product >>

General Information for Western Digital Hard Drives

Western Digital Red. HDD size: 3.5", HDD capacity: 4000 GB, HDD speed: 5400 RPM


Wd Red 4Tb Nas Hard Drives   Wd Red Is The Only Hard Drive Designed For Nas Systems That Have 1-5 Drive Bays. The Drives Are Designed And Extensively Tested For Compatibility In The Unique 24X7 Operating Environment And Demanding System Requirements Of Home And Small Office Nas.     The Right Choice! No Other Drive Is Designed Specifically For Home And Small Office Nas Systems And Pcs With Raid.   Exclusive Nasware Technology. Our Exclusive Technology, Nasware™, Makes Wd Red Thrive In The Demanding Small-Nas Environment.   Energy Efficient And Money Saving. We Keep Power Consumption Low Which Keeps Your Nas System Happy And Your Wallet, Too.   Need Help? We’Ll Keep Our Dedicated Premium Support Lines Open 24/7 With Experts Who Have The Answers Your Questions.    Nas Compatibility. Advanced Firmware Technology Built Into Every Wd Red Drive, Nasware Enables Seamless Integration, Robust Data Protection And Optimal Performance For Systems Operating In Nas And Raid Environments.   The Secret Is In The Technology. Wd’S Exclusive Nasware Technology Improves Nas Storage Performance By Reducing Common Hard Drive Concerns In Nas Systems Including Concerns For Things Like Compatibility, Integration, Upgrade Ability, Reliability And Cost Of Ownership That Are Experienced With A Hard Drive Designed For Desktop Computers.    3D Active Balance Plus. Our Enhanced Dual-Plane Balance Control Technology Significantly Improves The Overall Drive Performance And Reliability. Hard Drives That Are Not Properly Balanced May Cause Excessive Vibration And Noise In A Multidrive System, Reduce The Hard Drive Life Span, And Degrade The Performance Over Time.   Enhanced Reliability. Your Nas Systems Is Always On, A Highly Reliable Drive Is Essential. With A 35% Mtbf Improvement Over Standard Desktop Drives, The Wd Red Drive Is Designed And Manufactured To Be A More Reliable And Robust Solution.   Energy Efficient. Reduce Your Electricity Bill And Carbon Footprint With Wd Red Drives. Innovative Technology Reduces Power Consumption And Lowers The Operating Temperature, Resulting In A More Reliable And Affordable Solution For Always On 24X7 Nas Environments.   Premium Support. Exclusively For Wd Red Drive Customers, Our Free Dedicated 24/7 Support Line Is Available In English. Other Regional Support Hours Vary.   Longer Warranty Coverage. The Wd Red Drive Is Backed By A 3-Year Limited Warranty For Greater Peace Of Mind.   Ideal For. Specifically Designed And Tested For Small Office And Home Office, 1-5 Bay Nas Systems And Pcs With Raid. WD Red is the only hard drive designed for NAS systems that have 1-5 drive bays. Available in capacities ranging from 1 TB to 3 TB, WD Red is designed specifically for home and small office NAS systems. The drives are extensively tested for compatibility and reliability in the demanding operating environment of a 24x7 NAS system. WD's exclusive NASware firmware technology enables seamless integration and balanced performance. Innovative technology reduces power consumption and lowers the operating temperature, and with a 35% improvement in MTBF over desktop drives, WD Red is a more reliable and robust NAS hard drive solution.As hard drive capacities increase, the power required to run those drives increases as well. WD Green drives make it possible for energy-conscious customers to build systems with higher capacities and the right balance of system performance, ensured reliability, and energy conservation.4TB, 3.5", SATA 6Gb/s, 5400 RPM, 64MB Western Digital Red. HDD size: 3.5", HDD capacity: 4000 GB, HDD speed: 5400 RPM 3 year 03/09/2013
View more information on this product >>
View more information on this product >>
Product Specification

Western Digital Red 3.5" 4000 GB Serial ATA III WD40EFRX Specifications

Product Type Internal Hard Drives Product Type Hard Drives Brand Western Digital Collection Model Western Digital Red Manufacturer Product Type Western Digital Hard Drives Interface Serial ATA III Interface SATA 6Gb/s Form Factor Hard Disk Drive Product Family Red Product Family WD Red Response Time 1ms Response Time 6ms Response Time 12ms HDD speed 5400 RPM Drive device, buffer size 64 MB Power consumption (standby) 0.4 W Power consumption (idle) 3.3 W Power consumption (write) 4.5 W Power consumption (read) 4.5 W Operating voltage 5 / 12 V Start-up current 1.75 A Input Voltage 12 Power consumption (standby) 0.4 Start-up current 1.75 Type HDD Width 101.6 mm Depth 147 mm Height 26.1 mm Weight 680 g Weight 0.60kg Depth 14.7cm Height 26.1cm Width 10.16cm Device type HDD HDD capacity 4000 GB Mean time between failures (MTBF) 1000000 h Mean time between failures (MTBF) 1000000 Component for NAS Storage drive buffer size 64 MB HDD interface transfer rate 6 Gbit/s HDD sustained transfer rate 150 MiB/s Start/stop cycles 600000 HDD size 3.5" Operating temperature (T-T) 0 - 65 C Storage temperature (T-T) -40 - 70 C Operating shock 30 G Non-operating shock 250 G RoHS compliance Yes Sustainability certificates RoHS Storage drive adapter included No Quantity 1 Drive Capacity 4000GB Enclosure type Internal Drive Size 3.5 Inches Data Buffer/RAM 64MB Non Operating Temperature -40 to 70C Dimensions 10.16cm (W) x 14.7cm (D) x 26.1cm (H) - Weight 0.60kg Industry Standard Product Classification 40363 Environmental 0 to 70C Shock (Operating) 30Gs for 2ms Shock (Non Operating) 300G for 2ms Acoustics (Seek Mode) 25dB Acoustics (Idle Mode) 24dB Drive Size 3.5Inches ISPC Code 40363 Operating Temperature 0 to 70C Hard drive size 3.5 Hard drive interface Serial ATA III Hard drive interface transfer rate 6 Hard drive sustained transfer rate 150 Hard drive size 3.5" Hard Drive Capacity 4000 GB Hard drive interface transfer rate 6 Gbit/s Hard drive speed 5400 RPM Hard drive sustained transfer rate 150 MiB/s MPN WD40EFRX

Western Digital Red 3.5" 4000 GB Serial ATA III Downloads

Supplied With
100% Genuine Product, 21 Day Returns Policy - T&C Apply, All Official Packaging, All Applicable Guarantee(s), Instruction Manuals and Documentation (where applicable), Email when item is despatched
Best Sellers Rank

#298 in Hard Drives

Returns & Exchanges
21 Days Return Policy We want you to be delighted every time you shop with us. Occasionally though, we understand that you may wish to return items. Items can be returned direct to us within 21 days from the day of dispatch for a refund or exchange. To qualify for this, the product must not have been worn, and be in brand new condition. You must return all the original packaging, instructions, guarantee and any extras. All technology / electrical items including but not restricted to TVs, laptops, tablets etc must be still in their original packaging with the manufacturer seals still in tact. We are unable to accept returns for products which have been opened and/or used.
View full returns policy >>
Product Questions and Answers
View more product questions >>

Western Digital Red 3.5" 4000 GB Serial ATA III WD40EFRX Reviews

Share your thoughts with other customers - Write a customer review

Quzo Platinum Trusted Service Award 2022
Quzo Gold Trusted Service Award 2021
Quzo Gold Trusted Service Award 2020
Follow Quzo UK on FacebookFollow Quzo UK on TwitterFollow Quzo UK on Instgram
Help & SupportSupport Centre
Opening Hours
Mon - Friday (9:30am - 5:30pm)
Closed Saturday
Closed Sunday
Contact Details
Quzo UK
Kemp House, 124 City Road
United Kingdom
Email: 0203 195 3902

VAT Number: GB​ 267755458