Western Digital 4TB WD Blue PC HDD 3.5 inch 5400RPM SATA III CMR 128MB Cache Internal Hard Drive - WD40EZZX
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WD Blue WD40EZZX 4TB 3.5-Inch Internal Hard Drive SATA 6Gb/s 5400 RPM CMR Desktop HDD - WD40EZZX
Key Highlights
- 4TB Desktop Storage Capacity
- CMR Technology for Reliable Performance
- 5400 RPM Efficient Operation Class
- 128MB Cache Buffer
- Designed for Everyday Computing
The WD Blue 4TB Hard Drive (WD40EZZX) is built for reliable everyday desktop storage, offering a balance of capacity, performance, and long-term dependability. With a 4TB storage capacity, it is suitable for storing operating systems, applications, games, multimedia files, and general data backup needs.
This drive uses CMR (Conventional Magnetic Recording) technology, ensuring consistent write performance and stable operation for typical desktop workloads. It is engineered for compatibility with standard PC systems and is widely used as a primary or secondary storage drive in home and office environments.
Operating at 5400 RPM, the WD Blue delivers quiet and energy-efficient performance while maintaining stable data transfer rates of up to approximately 185 MB/s. The 128MB cache helps improve data access efficiency during everyday computing tasks.
Designed and tested by Western Digital for broad system compatibility, the WD Blue series is optimized for reliability, low power consumption, and long-term use in desktop PCs and external enclosures.
Ideal For
- Desktop PC Storage
- Everyday Computing
- Game Libraries
- File Storage & Backup
- Home & Office Systems
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About Brand
About Brand
Western Digital is a global leader in high-performance data storage, engineered for reliability, speed, and endurance. From HDDs to SSDs, WD drives deliver advanced technology and trusted performance for demanding workloads and professional applications.
Shipping & Rerturns
Shipping & Rerturns
• Shipping: Orders are processed within 1–2 business days. Standard delivery takes 3–7 business days depending on your location.
• Returns: You may return or exchange products within 30 days of receiving your order. Items must be in original condition with proof of purchase.
If your item is defective or damaged due to manufacturing issues, we’ll gladly replace it at no additional cost.
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Capacity : 4 TB
Form Factor : 3.5-inch LFF (Large Form Factor) internal HDD, 26.1mm height
Connector : SATA Revision 3.0 (6.0 Gb/s), standard 7-pin SATA data connector + 15-pin SATA power connector
Compatibility : Desktop PCs, SATA III (6Gb/s) systems, Windows 10/11, Linux systems, macOS (via SATA host or enclosure), standard 3.5-inch internal drive bays
Interface : SATA Revision 3.0 (6.0 Gb/s), standard 7-pin SATA data connector + 15-pin SATA power connector
Model Number : WD40EZZX
Recording Technology : CMR
Cache : 128 MB
Shipment Time
Handling time: All orders are shipped as soon as possible within 2 business day after payment confirmed. However, we cannot control transit time once your package is handed over to the courier. We process and ship orders Monday – Friday and are unable to offer weekend or holiday delivery.
Shipment Methods
All shipping requires additional 1-2 days of processing time
Free budget shipping (8-14 business days)
USPS Priority (3-7 business days)
Free 2-Day Shipping on Select Items – Includes Hard Drives, HPE Networking, and Yealink! (Choose free shipping at checkout)
Returns Policy
All products sold by aaawave.com are brand new and carry the manufacturer’s full warranty. All products advertised as BULK or OEM are brand new and carry the manufacturer’s full warranty.
*Note: "BULK" and "OEM" items do not come in a retail type of packaging, do not include hardware, accessories, cables,software, or literature. Unless otherwise noted.
All products are shipped to the customer the exact same way that we receive them from the manufacturer. We are NOT responsible for physical damage or misuse of the product, damage or misuse of the product will automatically void the manufacturer warranty.
* Note: AAAwave.com does not accept returns for refunds or exchanges of the following items: Product listings that state "Limited Supply, All sales are final". Opened software and software product keycards. The sales of all the items aforementioned are considered final.
Schedule and Time
AAAwave offers a 30 day return/exchange policy, unless otherwise noted. The return/exchange policy begins on the customers purchase date. No returns or exchanges will be accepted after 30 days. All refunds will be made back to the customer’s original form of payment within 7 business days of receiving the return merchandise. Return Merchandise Authorization number (RMA) are valid for only 10 business days. Packages must be received by us within 10 business days after the RMA number has been issued. Packages received after 10 business days will not be accepted and the warranty period will be considered voided and cancelled. RMA processing time is 5-7 business days once the package has been received.
Extra Charge
AAAwave reserves the right to refuse the return or to charge a minimum 10% restocking fee. There is no restocking fee if the product is returned factory sealed and unopened (including an intact UPC code) and must include all packing material, blank warranty cards, manuals, and accessories. AAAwave can only refund the original purchase price. We offer RMA replacement without any restocking fee to customers who have received a defective product. Shipping costs is non-refundable. Product exchanges can be accepted for defective items, the same exact item only.
Customer’s Duty
aaawave.com does NOT offer "Advanced Replacement" for the exchange of defective merchandise. aaawave.com does NOT pay the return shipping costs for defective merchandise. We are NOT responsible for product defects, because we do not manufacture the products we sell. aaawave.com will pay for shipping "Back to the customer" for exchange of defective items. All returns and exchanges must be accompanied with a Return Merchandise Authorization number (RMA number). Please contact us for a RMA number prior to sending your package. aaawave.com will NOT accept packages without prior authorization and a RMA number. All packages being shipped to aaawave.com must have a valid tracking number that is with a major courier such as UPS, FEDEX, or USPS.
What shipping options are available?
We offer standard and expedited shipping options within the U.S. Shipping rates and estimated delivery times are displayed at checkout. Shipments to Alaska, Hawaii, and other U.S. territories (i.e. Guam, Puerto Rico, Virgin Islands etc.) require expedited shipping and incur shipping charges. Items may be delivered separately in multiple shipments.
Do you ship internationally?
Currently, we only ship within the U.S. For international inquiries, please contact our support team.
What if a product is defective?
All new products carry the manufacturer's full warranty. If you receive a defective product, please contact us for a Return Merchandise Authorization (RMA) number. We offer RMA replacement for defective items (the same exact item only). Please note that we do not offer "Advanced Replacement" and do not cover return shipping costs for defective merchandise.
30 Day Return Policy.
AAAwave.com offers a 30 day return/exchange policy, unless otherwise noted. The return/exchange policy begins on the customers purchase date. All refunds will be made back to the customer’s original form of payment within 7 business days of receiving the return merchandise.
Are you an authorized reseller for the products you sell?
Yes, we are an authorized reseller for many brands, including Arduino, ASUSTOR, Avermedia, Dynatron, HPE networking, Gigabyte, MSI, Intel, XFX and Streacom.
How can I track my order?
Once your order ships, you will receive a tracking number via email. You can also track your order by logging into your AAAwave.com account and ask our chatbot.
Do your products come with a warranty?
Yes, most of our products are covered by the manufacturer’s warranty. Warranty details can be found on the product page or by contacting our support team.
What are your business hours?
Monday – Friday(Excluding Holidays)8:30am – 5:00pm PST
Discover more in our FAQ
Shoot our team an email & we’ll get back to you ASAP
How long does it take to process an order?
How long does it take to process an order?
Orders are typically processed within 1–2 business days. You will receive a confirmation email with tracking details once your order has been shipped. Please note that processing times may be slightly longer during high-demand periods or sales events.
Do you ship internationally?
Do you ship internationally?
Currently, we only ship within the U.S. For international inquiries, please contact our support team.
What is your return policy?
What is your return policy?
We accept returns within 30 days of delivery. To be eligible, items must be unused, in their original packaging, and accompanied by proof of purchase. If the item is faulty or damaged, please contact us for further instructions. For returns due to reasons other than product defects or our error, customers are responsible for return shipping costs.