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Designed for power users to medium-sized organizations in RAID-optimized NAS systems with up to 24 bays. Perfect for archiving, sharing, and protecting rapidly growing amounts of data.
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Shipping & Returns
Shipping & Returns
Most orders ship within a few business days — you will get tracking by email as soon as it is on the way. Questions about a delivery or a return? Reach our US-based team at info@improvemintfinancial.com or (855) 447-4921.
Highlights
- Storage Capacity : 18 TB , see in specifications
- Storage Drive Type : HDD , see in specifications
- Product Compatibility : Network Attached Storage (NAS), Desktop computers , see in specifications
- Form Factor : 3.5 in. , see in specifications
- Maximum Read Speed : 272 megabytes per second , see in specifications
- Interface(s) : SATA , see in specifications
- Rotational Speed : 7200 RPM , see in specifications
- Usage : Network Attached Storage (NAS) , see in specifications
Specifications
General
| Brand | WD |
|---|---|
| Model Number | WD181KFGX |
| Product Name | Red Pro 18TB NAS Internal Hard Drive |
| Product Width | 4 inches |
| Product Height | 1.028 inches |
| Product Weight | 24.32 ounces |
| Warranty - Parts | 5 years |
| Warranty - Labor | 5 years |
All specifications (23)
Key specs
| Cache Buffer Size | 512 megabytes |
|---|---|
| Storage Drive Type | HDD |
| Interface(s) | SATA |
| Form Factor | 3.5 in. |
| Storage Capacity | 18000 gigabytes |
| Lighting Type | None |
Other
| Rotational Speed | 7200 revolutions per minute |
|---|---|
| Maximum Read Speed | 272 megabytes per second |
| Maximum Write Speed | 272 megabytes per second |
| Heatsink | No |
| Internal Or External | Internal |
| Product Compatibility | Network Attached Storage (NAS) |
| Data Encryption | No |
| Usage | Network Attached Storage (NAS) |
| Minimum System Requirements | Specifically designed for use in NAS systems with up to 8 bays |
Features
- Demands of Big Business Designed specifically with medium or large scale business customers, WD Red Pro drives are available for up to 24-bay NAS systems. Engineered to handle high-intensity workloads in 24x7 environments. Ideal for archiving and sharing, as well as RAID array extended systems.
- Technology Exclusive advanced firmware technology, NASware 3.0, enables seamless integration, robust data protection and optimal performance for NAS systems operating under heavy demand. Improves storage performance by increasing compatibility, integration, upgradeability, and reliability.
- Compatibility Optimized for NAS systems, unique algorithm balances performance and reliability in NAS and RAID environments. WD Red Plus drive is one of the most compatible drives available for NAS enclosures. Reflection of extensive NAS partner technology engagement and compatibility testing.
- Protection WD Red Pro drives are equipped with a multi-axis shock sensor that automatically detects subtle shock events and dynamic fly height technology which adjusts each read-write function to compensate and protect the data. Protects the drives in larger 24-bay NAS environments.
- 3D Active Balance Our enhanced dual-plane balance control technology improves the overall drive performance and reliability. Hard drives that are not properly balanced may cause excessive vibration and noise in a multi-drive system, reduce the hard drive life span, and degrade the performance.
- Error Recovery Prevention Built specifically for RAID and NAS environments, WD Red Pro drives come equipped with error recovery controls as part of NASware 3.0 technology to help reduce drive fallout in RAID applications
- Extended Drive Testing NAS environment that has up to 24 bays is very demanding on a hard drive with add?ed vibration and heat. This is why every WD Red Pro drive is shipped with extended thermal cycle burn-in testing to help ensure each drive is tested for extended reliable operation
- Longer Warranty Coverage WD Red Pro drives comes with a 5-year limited warranty for an even greater peace of mind.
Customer reviews
4.0
out of 5
27 customer reviews
Most recent 10 reviews
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Plug it in and use it
Purchased it for a RAID 0 NAS. It has been fast and reliable.
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Buyers beware.
The Pros: Great when it ran in my UGREEN NASync DXP4800 Plus in a raid5 setup. A bit of spin up time maybe 10ish seconds in lag but that could be the hdds or the nas so I wont fault them. The Cons: Bought 4 around April 2025. 1 was doa(clicking) and replaced by best buy because they were within the exchange window. A 2nd failed Feb 2026 less than 1 year later. They are being used in a nas so literally their intended purpose. Only around 6800hr of power on time, at a 50% failure rate for HDDs that you pay a premium for is a bit disappointing. Bad batch? Who knows! Also these are not covered by…
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Sent wrong product in the right packaging.
Delayed installing due to internet issues and the return expired. They sent 6 TB drives in 18 TB packaging. Never buying from best buy again.
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Good drive
A little slow to spin up. A little noisy at first. Other than that, I have no other issues. Speed is good. Works great with my NAS. Tons of space. I’ve always trusted WD drives.
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Works great, smidge noisy
Hard drive works great. It has been running 24 hours straight since I purchased. Subtle noise, but annoying but otherwise fine.
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Good, just wish it was cheaper
Good NAS grade drive, just wish storage at this tier was cheaper when you need to build out a NAS with 4+ drives - gets expensive fast
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Great high capacity HDD.
I am using my 18TB WD Red Pro as a local backup repository for my PC. It replaces a smaller HDD that was doing a good job but was getting to be too small. So far, it’s been doing a fine job, I’ve had no issues with it. I installed it in a previously vacant slot in a multi-drive external HDD enclosure without any problems.
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Lots of reliable storage at a decent price
Ive bought several of these WD Red Pro drives over the years and they handle what i need at speeds that get the job done
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Great quality!
I bought 2 of these for my computer. I bought 1 last year and that one also still works like a charm. The 2 drives I bought this year works great without any issues. These 2 drives were manufactured in 2024 of December. Takes a bit to spin up once powered on but works flawlessly with zero issues. Copying transfer speed is around 150-190mbps. Will be buying another 1 this weekend!
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Good HD make noise
My second WD Red 18TB, everything is fine, but it makes a lot of noise, which is normal. I hope it lasts for many years in my DIY NAS.
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