6 Best Alternatives to the Seagate Exos X20 18TB Renewed (2026)
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
The Seagate Exos X20 18TB 7200 alternatives list helps you find drives that match its enterprise-grade specifications. This model offers 18TB of storage in a 3.5-inch form factor with a SATA 6Gb/s interface. Its helium sealing technology and 7200 RPM rotational speed provide high throughput for data centers. You might consider other options if you need different capacity, cache size, or brand preferences. The alternatives in this guide were chosen because their specs overlap with the original drive's core requirements.
Each listed drive shares key attributes like 3.5-inch form factor and SATA connectivity. Some offer lower capacity but higher cache sizes for specific RAID setups. Others provide similar rotational speeds with different storage limits. You can compare these specifications to determine which drive fits your system best. The list includes options from brands like Toshiba, Western Digital, and HGST. All selections maintain the enterprise reliability standards set by the Exos X20. Review the detailed specs for each model to find the right balance of performance and capacity for your needs.
Our top pick: Seagate Exos X20 18TB Renewed Internal Hard Drive.
How alternatives compare to Exos X20
Toshiba 14TB Enterprise 7200 RPM HDD (Renewed)
The Toshiba MG07 offers 14TB of storage, which is 4TB less than the Exos X20. It shares the same 7200 RPM rotational speed and SATA interface. This drive includes a 256MB cache, which is larger than the unspecified cache on the X20. Its helium technology aids in heat management for dense NAS arrays. You should choose this if you prioritize sustained write speeds and thermal efficiency over maximum capacity. It fits well in systems where space is limited but performance remains critical. The slightly lower capacity allows for more drives in a single chassis, potentially increasing total array throughput.
Western Digital RE 4TB 7200 RPM Hard Drive
The Western Digital RE 4TB provides significantly less storage than the Exos X20, offering only 4TB versus 18TB. It maintains the 7200 RPM speed and 3.5-inch form factor. This model features a 64MB cache, which is smaller than the 256MB cache found in many competitors. It is designed for environments where reliability and speed matter more than raw storage volume. You might select this drive for small-scale enterprise needs or as a high-performance boot drive. Its compact capacity makes it suitable for systems with limited drive bays or for users who need fast access to frequently used data rather than bulk archival storage.
Seagate Exos X14 14TB Renewed Enterprise HDD
The Seagate Exos X14 offers 14TB of capacity, which is 4TB less than the 18TB Exos X20. Both drives share the 7200 RPM rotational speed and SATA interface. The X14 is a renewed enterprise drive, similar to the X20. It lacks the specific cache size data in the provided specs, but it maintains the same enterprise-class reliability standards. You should consider this if you want a trusted Seagate enterprise drive at a potentially lower capacity tier. It fits users who need robust performance but do not require the absolute highest storage density. The shared form factor ensures compatibility with existing 3.5-inch drive bays in your server or NAS.
MFerraz 6TB Enterprise 7200 RPM Hard Drive
The MFerraz 6TB drive offers much less storage than the Exos X20, providing only 6TB versus 18TB. It matches the 7200 RPM speed and 3.5-inch form factor. This model includes a 256MB cache, which matches the cache size of several other alternatives. It is designed for performance-focused RAID arrays where lower capacity per drive is acceptable. You might pick this if you need many drives in a RAID configuration to achieve high throughput. The smaller capacity allows for more drives in your enclosure, which can improve parallel read/write speeds. It is a practical option for users who prioritize speed and redundancy over single-drive capacity.
Seagate Exos X16 14TB Renewed Hard Drive
The Seagate Exos X16 provides 14TB of storage, which is 4TB less than the Exos X20. It shares the 7200 RPM speed and SATA interface. This drive features a 256MB cache, which is larger than the unspecified cache on the X20. It is a renewed enterprise hard drive, similar to the X20. You should choose this if you want a reliable Seagate drive with a larger cache for better performance in data center applications. It fits users who value speed and reliability over the highest possible capacity. The 14TB capacity is still substantial for most enterprise workloads, offering a balance between performance and storage density.
HGST Ultrastar He10 10TB Enterprise Hard Drive
The HGST Ultrastar He10 offers 10TB of storage, which is 8TB less than the Exos X20. It maintains the 7200 RPM speed and 3.5-inch form factor. This drive includes a 256MB cache, which is larger than the unspecified cache on the X20. It uses helium technology for improved efficiency and heat management. You might select this if you prioritize helium sealing and enterprise reliability in a smaller capacity package. It fits users who need fast access to data but do not require 18TB per drive. The 10TB capacity allows for more drives in your system, which can enhance redundancy and performance in RAID setups.
Quick picks
Our 7 picks
Seagate Exos X20 18TB Renewed Internal Hard Drive
Best for: high-capacity enterprise data center storage
- Storage Capacity
- 18TB
- Form Factor
- 3.5"
- Hardware Interface
- SATA 6Gb/s
- Rotational Speed
- 7200 RPM
- Dimensions
- 5.8 × 4 × 1 inches
- Weight
- 1.48 pounds
View on Amazon: Seagate Exos X20 18TB Renewed Internal Hard Drive Affiliate link
The Seagate Exos X20 18TB is an enterprise-class hard drive designed for hyperscale environments. It features 7200 RPM rotational speed and a SATA 6Gb/s interface. The drive uses helium side-sealing technology and includes digital environmental sensors. With a 2.5M-hr MTBF rating, it offers robust reliability for cloud and data center applications. You should choose this drive if you need high capacity and proven enterprise performance.
Pros
- 18TB storage capacity
- 7200 RPM rotational speed
- Helium side-sealing weld technology
- 2.5M-hr MTBF reliability rating
- Digital environmental sensors
Cons
- Heavier than smaller capacity drives at 1.48 pounds
- Larger physical dimensions than 2.5-inch options
- No mention of included mounting hardware
Good fit if
- You require maximum storage density per drive
- You need enterprise-grade reliability for data centers
- You are building a high-performance hyperscale storage array
Skip if
- You need a drive for a standard consumer desktop
- You require a smaller 2.5-inch form factor
- You are looking for a budget-friendly consumer drive
Verdict: Seagate Exos X20 18TB is a high-capacity enterprise drive suited for data centers needing 18TB per slot. It fits users prioritizing reliability and speed over compact size.
Toshiba 14TB Enterprise 7200 RPM HDD (Renewed)
Best for: NAS users needing speed and helium efficiency
- Storage Capacity
- 14TB
- Form Factor
- 3.5"
- Hardware Interface
- SATA 6.0Gb/s
- Rotational Speed
- 7200RPM
- Cache Size
- 256MB
- Dimensions
- 7.5 × 5.5 × 2.5 inches
View on Amazon: Toshiba 14TB Enterprise 7200 RPM HDD (Renewed) Affiliate link
The Toshiba MG07ACA14TE is a 14TB enterprise drive with 7200 RPM rotational speed and a 256MB cache. It uses a helium-sealed design and SATA 6.0Gb/s interface. This renewed unit offers high performance for NAS setups. It suits users needing reliable storage with consistent speeds. The 3.5-inch form factor fits standard drive bays. You get enterprise-grade reliability in a compact package.
Pros
- 7200 RPM rotational speed for fast data access
- 256MB cache reduces latency during heavy workloads
- Helium-sealed design improves efficiency and cooling
- SATA 6.0Gb/s interface ensures broad compatibility
Cons
- 14TB capacity is lower than the 18TB Exos X20
- Renewed condition means it is not brand new
- Heavier build at 1.5 pounds compared to some alternatives
Good fit if
- You need enterprise-grade reliability for a NAS
- You want high rotational speed for performance
- You prefer helium-sealed drives for efficiency
Skip if
- You require the maximum 18TB capacity available
- You prefer brand new drives over renewed ones
- You need a lighter drive for portable use
Verdict: Toshiba MG07 14TB 7200RPM Helium HDD is a solid choice for users prioritizing speed and efficiency over raw capacity. It fits well in dense NAS arrays where performance matters most.
Western Digital RE 4TB 7200 RPM Hard Drive
Best for: Small capacity high-reliability enterprise needs
- Storage Capacity
- 4TB
- Form Factor
- 3.5in
- Hardware Interface
- SATA 6.0Gb/s
- Rotational Speed
- 7200 RPM
- Cache Size
- 64MB
- Dimensions
- 9.3 × 5.4 × 3.7 inches
View on Amazon: Western Digital RE 4TB 7200 RPM Hard Drive Affiliate link
The Western Digital RE WD4000FYYZ is a 4TB enterprise hard drive designed for 24x7 operation. It features 7200 RPM rotational speed and a 64MB cache for consistent performance. The drive uses a SATA 6.0Gb/s interface and includes a dual processor architecture. This OEM model offers high reliability with a 1.2 million hour MTBF rating. It suits users who need dependable storage for business-critical applications.
Pros
- 7200 RPM rotational speed for high performance
- 64MB cache for improved data handling
- SATA 6.0Gb/s interface for fast transfers
- 1.2 million hour MTBF rating for reliability
- Dual processor for maximized performance
Cons
- 4TB capacity is much lower than 14TB or 18TB alternatives
- OEM model lacks manufacturer warranty coverage
- Heavier build at 1 pound compared to some competitors
Good fit if
- You need enterprise-grade reliability for 24/7 use
- You require high rotational speed for performance
- You are building a system with limited drive bays
Skip if
- You need large storage capacity like 14TB or more
- You want a retail product with full warranty
- You prefer lighter drives for easier handling
Verdict: Western Digital RE 4TB 7200 RPM is a solid choice for users prioritizing speed and reliability over raw capacity. It fits well in systems where drive space is limited but performance is critical.
Seagate Exos X14 14TB Renewed Enterprise HDD
Best for: high-capacity enterprise storage needs
- Storage Capacity
- 14TB
- Form Factor
- 3.5-Inch
- Hardware Interface
- SATA 6Gb/s
- Rotational Speed
- 7200RPM
- Dimensions
- 5.8 × 4 × 1 inches
- Weight
- 1.5 pounds
View on Amazon: Seagate Exos X14 14TB Renewed Enterprise HDD Affiliate link
This renewed Seagate Exos X14 offers 14TB of storage in a 3.5-inch form factor. It spins at 7200 RPM and uses a SATA 6Gb/s interface. The drive is manufacturer recertified with less than 50 power-on hours. You get a one-year seller warranty. It suits users needing high-capacity enterprise storage without the cost of new hardware.
Pros
- 14TB storage capacity
- 7200 RPM rotational speed
- SATA 6Gb/s interface
- Manufacturer recertified condition
Cons
- Lower capacity than 18TB alternatives
- Only 1-year seller warranty
- Renewed condition requires trust in recertification
Good fit if
- You need high-capacity enterprise storage
- You want a reliable 7200 RPM drive
- You are open to renewed hardware
Skip if
- You require maximum 18TB capacity
- You need a manufacturer warranty
- You prefer brand new drives
Verdict: Seagate Exos X14 14TB Enterprise HDD is a solid choice for users who prioritize rotational speed and capacity over the absolute highest storage limit. It fits those comfortable with renewed enterprise hardware.
MFerraz 6TB Enterprise 7200 RPM Hard Drive
Best for: Performance-focused RAID arrays with lower capacity needs
- Storage Capacity
- 6TB
- Form Factor
- 3.5-Inch
- Hardware Interface
- SATA 6Gb/s
- Rotational Speed
- 7200 RPM
- Cache Size
- 256MB
- Dimensions
- 5.8 × 4 × 1 inches
View on Amazon: MFerraz 6TB Enterprise 7200 RPM Hard Drive Affiliate link
This renewed enterprise drive offers 6TB of storage with a 7200 RPM spindle speed and 256MB cache. It uses a SATA 6Gb/s interface for reliable data transfer in NAS and server environments. The 3.5-inch form factor fits standard bays. It is designed for 24/7 operation and optimized for RAID arrays. You should choose this if you need high rotational speed but can accept lower capacity compared to 14TB or 18TB alternatives.
Pros
- 7200 RPM rotational speed for fast data access
- 256MB cache buffer for efficient transfers
- Enterprise-grade reliability for 24/7 operation
- SATA 6Gb/s interface compatibility
Cons
- 6TB capacity is significantly lower than 14TB or 18TB competitors
- Renewed condition rather than new
- Brand is third-party MFerraz, not original manufacturer
Good fit if
- You need high performance per drive in a multi-drive array
- You have limited budget but require enterprise specs
- You are building a RAID where total capacity matters less than speed
Skip if
- You require maximum storage density per slot
- You prefer original manufacturer warranty coverage
- You need a single drive with 14TB or more capacity
Verdict: MFerraz 6TB 7200 RPM Enterprise HDD is a practical option for users prioritizing rotational speed and cache size over raw capacity in a RAID setup.
Seagate Exos X16 14TB Renewed Hard Drive
Best for: High-performance enterprise storage arrays
- Storage Capacity
- 14TB
- Form Factor
- 3.5-Inch
- Hardware Interface
- SATA 6Gb/s
- Rotational Speed
- 7200 RPM
- Cache Size
- 256MB
- Dimensions
- 4.01 × 5.97 × 1.03 inches
View on Amazon: Seagate Exos X16 14TB Renewed Hard Drive Affiliate link
This renewed enterprise drive offers 14TB of storage with 7200 RPM rotational speed and a 256MB cache. It uses a SATA 6Gb/s interface in a 3.5-inch form factor. You get a two-year warranty on this recertified unit. It suits users needing high performance for data centers or heavy workloads. The 14TB capacity is smaller than some alternatives, but the speed remains high.
Pros
- 256MB cache for faster data access
- 7200 RPM rotational speed for performance
- SATA 6Gb/s interface compatibility
- 2-year warranty on renewed unit
Cons
- 14TB capacity is lower than 18TB or 26TB options
- Renewed condition means prior usage history
- Enterprise form factor may be bulky for small cases
Good fit if
- You need high rotational speed for intensive tasks
- You want a large enterprise-grade drive with warranty
- You are building a high-density storage array
Skip if
- You require the maximum possible storage capacity
- You prefer a brand-new drive with zero hours
- You need a compact 2.5-inch drive for portability
Verdict: Seagate Exos X16 14TB Enterprise HDD delivers strong performance with its 7200 RPM speed and 256MB cache. It fits users who prioritize speed and reliability over raw capacity in a renewed enterprise package.
HGST Ultrastar He10 10TB Enterprise Hard Drive
Best for: Enterprise users needing speed and reliability
- Storage Capacity
- 10TB
- Form Factor
- 3.5-Inch
- Hardware Interface
- SATA 6Gb/s
- Rotational Speed
- 7200 RPM
- Cache Size
- 256MB
View on Amazon: HGST Ultrastar He10 10TB Enterprise Hard Drive Affiliate link
The HGST Ultrastar He10 is a 10TB enterprise hard drive designed for high-performance storage. It features a 7200 RPM spindle speed and 256MB of cache, ensuring fast data access. The drive uses helium technology to reduce vibration and extend lifespan. It includes a power disable feature and an adapter cable for legacy systems. This drive suits users needing reliable, high-speed storage in a 3.5-inch form factor.
Pros
- 10TB storage capacity
- 7200 RPM rotational speed
- 256MB cache size
- Helium-filled design for lower vibration
Cons
- Smaller 10TB capacity compared to 14TB or 18TB alternatives
- Requires adapter cable for legacy systems
- Heavier build due to enterprise-grade construction
Good fit if
- You need enterprise-grade reliability
- You require high rotational speed
- You want helium-filled drive benefits
Skip if
- You need more than 10TB capacity
- You are using a modern system without legacy constraints
- You prefer lighter, air-filled drives
Verdict: HGST Ultrastar He10 10TB Enterprise HDD is ideal for users prioritizing speed and reliability in a compact 10TB package. It fits those who value helium technology and enterprise features over higher capacity options.
Specifications side by side
| Spec | Seagate Exos X20 18TB Renewed Internal Hard Drive | Toshiba 14TB Enterprise 7200 RPM HDD (Renewed) | Western Digital RE 4TB 7200 RPM Hard Drive | Seagate Exos X14 14TB Renewed Enterprise HDD | MFerraz 6TB Enterprise 7200 RPM Hard Drive | Seagate Exos X16 14TB Renewed Hard Drive | HGST Ultrastar He10 10TB Enterprise Hard Drive |
|---|---|---|---|---|---|---|---|
| Storage Capacity | 18TB | 14TB | 4TB | 14TB | 6TB | 14TB | 10TB |
| Form Factor | 3.5" | 3.5" | 3.5in | 3.5-Inch | 3.5-Inch | 3.5-Inch | 3.5-Inch |
| Hardware Interface | SATA 6Gb/s | SATA 6.0Gb/s | SATA 6.0Gb/s | SATA 6Gb/s | SATA 6Gb/s | SATA 6Gb/s | SATA 6Gb/s |
| Rotational Speed | 7200 RPM | 7200RPM | 7200 RPM | 7200RPM | 7200 RPM | 7200 RPM | 7200 RPM |
| Cache Size | not stated | 256MB | 64MB | not stated | 256MB | 256MB | 256MB |
| Size | 18 TB | not stated | 4 TB | not stated | 8.90 x 6.00 x 2.90 Inches" | 14TB | 10TB - SE |
| Dimensions | 5.8 × 4 × 1 inches | 7.5 × 5.5 × 2.5 inches | 9.3 × 5.4 × 3.7 inches | 5.8 × 4 × 1 inches | 5.8 × 4 × 1 inches | 4.01 × 5.97 × 1.03 inches | not stated |
| Weight | 1.48 pounds | 1.5 pounds | 1 pounds | 1.5 pounds | 1 pounds | 1.5 pounds | not stated |
| Color | green | Silver | Silver | Silver | not stated | Silver | Silver |
| Model | Exos X20 | MG07ACA14TE | WD4000FYYZ OEM-cr | Exos X14 | ST6000NM0115 | ST14000NM001G | 0F27454-cr |
If you need high-speed NVMe storage rather than bulk mechanical capacity, compare seagate firecuda 530 alternatives for PCIe drives.
Frequently asked questions
Which drive offers the most storage capacity in this list?
The Seagate Exos X20 18TB provides the highest capacity at 18TB. It fits into a standard 3.5-inch form factor. This makes it ideal for users who need maximum space per drive slot. Other options like the Toshiba MG07 and Seagate Exos X14 offer 14TB, which is less storage than the top pick.
Do all these alternatives use the same connection interface?
Yes, every drive listed uses a SATA hardware interface. This ensures compatibility with most enterprise servers and NAS systems that support standard SATA connections. You can swap these drives without needing special adapters or different cabling, as they all rely on the same SATA standard for data transfer.
Which drives include a 256MB cache for better performance?
The Toshiba MG07, MFerraz 6TB, and Seagate Exos X16 all feature a 256MB cache. A larger cache helps buffer data, which can improve performance during heavy write operations. The Western Digital RE has a smaller 64MB cache, while the Exos X20 and Exos X14 do not list a specific cache size in their attributes.
Is there a helium-filled option among these alternatives?
The Toshiba MG07 14TB is described as a helium HDD. Helium sealing reduces friction and heat, which can improve efficiency in dense arrays. The HGST Ultrastar He10 also uses helium technology, as indicated by its model name. These features help maintain stability and speed in high-density enterprise environments.
Which drive is best for users prioritizing speed over capacity?
The Western Digital RE 4TB is best for those prioritizing speed and reliability over raw capacity. It offers 4TB in a 3.5-inch form factor with 7200 RPM rotation. While it has less storage than the 18TB Exos X20, it suits systems where drive space is limited but performance is critical.
What form factor do these enterprise drives use?
All listed drives use a 3.5-inch form factor. This is the standard size for desktop and enterprise hard drives. You can install them in most standard drive bays found in NAS enclosures and server racks. None of the options are smaller 2.5-inch drives, so you need adequate space for full-sized units.
How does the weight of these drives compare?
Most drives weigh around 1.5 pounds, including the Seagate Exos X20, Toshiba MG07, and Seagate Exos X14. The Western Digital RE is lighter at 1 pound. The MFerraz drive also lists a weight of 1 pound. These weights are typical for 3.5-inch enterprise drives and fit within standard mounting requirements.