Looking Beyond the HelioSeal HGST? 6 Alternatives Worth a Look

Comparing these helium alternatives

Toshiba 14TB Enterprise 7200 RPM HDD (Renewed)

The Toshiba MG07 14TB offers two more terabytes than the WD Ultrastar DC HC520. It maintains the same 7200 RPM speed and 256MB cache for consistent performance. The primary difference is capacity density. You get more storage in the same 3.5-inch form factor. This drive is renewed, so you trade a new hardware warranty for higher capacity at a lower entry point. It suits enterprise arrays where raw space matters most. If you need more than 12TB without changing your chassis, this is a direct upgrade path. The sealed enclosure design keeps power efficiency high, similar to the HGST model.

Seagate Exos 7E8 6TB Enterprise Drive

The Seagate Exos 7E8 6TB provides half the storage of the 12TB WD drive. It shares the 7200 RPM spindle and 256MB cache specifications. This smaller capacity makes it ideal for compact NAS systems or entry-level RAID arrays where space is limited. You sacrifice raw storage volume for a potentially lower power draw per drive in small setups. The enterprise-grade reliability remains intact. It fits users who do not need massive single-drive capacity but want high workload endurance. If your NAS has fewer bays, this drive offers a balanced mix of speed and size without the bulk of larger helium-filled units.

MFerraz 6TB Enterprise 7200 RPM Hard Drive

The MFerraz 6TB Enterprise HDD matches the Seagate Exos 7E8 in capacity and specs. It features 7200 RPM rotation and a 256MB cache on a SATA interface. Like the smaller Seagate, it offers less storage than the 12TB WD Ultrastar. This drive targets users who need reliable 24/7 operation in smaller form factors. It gives up the high-density advantage of larger drives for easier management in tight spaces. The 3.5-inch form factor ensures compatibility with standard NAS enclosures. If you prioritize workload reliability over maximum terabytes, this alternative provides solid enterprise performance in a compact package.

Seagate Exos X16 14TB Renewed Hard Drive

The Seagate Exos X16 14TB matches the Toshiba option with double the capacity of the WD Ultrastar DC HC520. It retains the 7200 RPM speed and 256MB cache for fast data access. This renewed drive provides a 2-year warranty, offering more security than some other renewed options. It is built for high-capacity enterprise storage needs. You gain two extra terabytes for the same physical footprint. This makes it excellent for maximizing density in existing server racks. If you require more than 12TB and want a reputable brand with a warranty, this is a strong contender. The performance characteristics remain consistent with other high-end helium drives.

HGST Ultrastar He10 10TB Enterprise Hard Drive

The HGST Ultrastar He10 10TB offers less capacity than the 12TB WD drive but shares the same helium-sealed technology. It runs at 7200 RPM with a 256MB cache on a SATA interface. This model is ideal for users who prioritize helium sealing for vibration control and power efficiency. You give up two terabytes of storage for a potentially more established helium design history. It fits well in dense NAS arrays where stability is critical. If you prefer a known helium platform over the newer DC HC520, this drive provides reliable enterprise performance. The 3.5-inch form factor ensures it works in standard NAS enclosures.

MDD 14TB 7200 RPM 3.5-Inch Hard Drive

The MDD 14TB 7200RPM Enterprise HDD matches the capacity of the larger Seagate and Toshiba options. It features a 256MB cache and SATA interface for reliable data transfer. This drive focuses on raw performance for heavy storage tasks. It gives up brand recognition and new hardware warranties for high capacity and speed. The 3.5-inch form factor fits standard NAS bays. It suits users who prioritize capacity and rotational speed over included accessories or new unit guarantees. If you need 14TB of space and want enterprise-grade reliability, this alternative delivers. It is a practical choice for expanding storage arrays without changing your hardware setup.

Quick picks

Our 7 picks

1 Best overall

WD Ultrastar DC HC520 12TB Helium Drive

Best for: high-density data center and surveillance storage

Storage Capacity

12TB

Form Factor

3.5-Inch

Hardware Interface

SATA 6Gb/s, SATA III

Rotational Speed

7200 RPM

Cache Size

256MB

Dimensions

5.79 × 4.01 × 1.03 inches

View on Amazon: WD Ultrastar DC HC520 12TB Helium Drive Affiliate link

This 12TB drive uses helium sealing to improve density and power efficiency. It features a 7200 RPM spindle and 256MB cache on a SATA III interface. The design targets high-capacity data centers and cloud storage. You get a robust build with a 2.5M MTBF rating. It suits users needing reliable, high-density storage for enterprise or surveillance applications.

Pros

• 12TB storage capacity in a 3.5-inch form factor
• Helium-filled design for lower power consumption
• 7200 RPM rotational speed with 256MB cache
• 2.5M hours MTBF for high reliability

Cons

• SATA III interface limits transfer speeds compared to SAS
• No USB or external connectivity options included
• OEM warranty requires authorized reseller support

Good fit if

• You need high-density storage for a data center
• You require enterprise-grade reliability for surveillance
• You want power-efficient helium-filled drives

Skip if

• You need USB connectivity for direct PC use
• You require SAS interface for server integration
• You prefer retail warranty support over OEM

Verdict: WD Ultrastar DC HC520 12TB Helium Drive offers high density and efficiency for data centers. It fits users prioritizing capacity and reliability over consumer convenience.

2 Also great

Toshiba 14TB Enterprise 7200 RPM HDD (Renewed)

Best for: High-density enterprise storage arrays

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

This Toshiba MG07ACA14TE is a 14TB enterprise hard drive in a 3.5-inch form factor. It uses a helium-sealed design with nine platters to maintain stability. The drive spins at 7200 RPM and connects via SATA 6.0Gb/s. It includes 256MB of cache and 512e persistent write cache technology. You get high capacity and speed for dense storage arrays.

Pros

• 14TB storage capacity for large datasets
• 7200 RPM rotational speed for performance
• Helium-sealed design reduces heat and noise
• 256MB cache for efficient data handling

Cons

• Renewed condition means no new warranty
• Heavier build at 1.5 pounds
• Standard SATA interface limits transfer speeds

Good fit if

• You need maximum capacity per drive
• You run enterprise-grade storage servers
• You prefer helium-sealed drive technology

Skip if

• You require a brand new unit
• You need faster than SATA speeds
• You have limited rack space weight

Verdict: Toshiba MG07 14TB Enterprise HDD fits users needing high density and speed in a sealed enclosure. It suits server builds where capacity matters more than new hardware warranties.

3 Best budget

Seagate Exos 7E8 6TB Enterprise Drive

Best for: Small NAS systems needing high workload reliability

Storage Capacity

6TB

Form Factor

3.5-Inch

Hardware Interface

SATA

Cache Size

256MB

Workload Rate Limit

550TB per year

Dimensions

5.79 × 4.01 × 1.03 inches

View on Amazon: Seagate Exos 7E8 6TB Enterprise Drive Affiliate link

This Seagate Exos 7E8 drive offers 6TB of storage in a 3.5-inch form factor. It features a 256MB cache and a SATA interface. The drive supports workloads up to 550TB per year, making it suitable for heavy application usage. It is designed for 24/7 operation in enterprise or business-centric NAS systems. You get a reliable option for servers and storage systems that require high reliability and consistent performance.

Pros

• 6TB storage capacity for substantial data needs
• 256MB cache for improved data transfer efficiency
• 550TB per year workload rate limit for heavy usage
• 2 million hour MTBF rating for long-term reliability

Cons

• 6TB capacity is smaller than the 12TB and 14TB options on this list
• 7200 RPM speed is lower than some competing enterprise drives
• Renewed condition may vary in cosmetic appearance

Good fit if

• You need a reliable drive for a small NAS or server
• You prioritize workload rate limits over maximum capacity
• You want an enterprise-grade drive for 24/7 operation

Skip if

• You require more than 6TB of storage in a single drive
• You need the highest possible RPM speed for performance
• You prefer a new drive with a full manufacturer warranty

Verdict: Seagate Exos 7E8 6TB Enterprise HDD fits users who need reliable, high-workload performance in a compact capacity. It is ideal for small-scale enterprise storage where workload limits matter more than raw size.

4 Also great

MFerraz 6TB Enterprise 7200 RPM Hard Drive

Best for: Small NAS setups requiring enterprise reliability

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 MFerraz ST6000NM0115 is a 6TB enterprise hard drive designed for 24/7 operation in NAS and server environments. It features a 7200 RPM spindle speed and 256MB cache to handle demanding workloads. The SATA 6Gb/s interface ensures broad compatibility with desktops and RAID arrays. It is built for multi-drive systems with enhanced vibration tolerance. You should consider this drive if you need reliable storage for business data or surveillance footage.

Pros

• 7200 RPM rotational speed for fast data transfers
• 256MB cache improves performance for demanding workloads
• SATA 6Gb/s interface for broad compatibility
• Designed for 24/7 enterprise operation

Cons

• Lower 6TB capacity compared to 10TB and 12TB alternatives
• Renewed condition rather than new
• No mention of HelioSeal helium technology

Good fit if

• You need enterprise-grade reliability for a NAS
• You require 7200 RPM performance for heavy workloads
• You are building a multi-drive RAID array

Skip if

• You need higher capacity than 6TB
• You prefer helium-filled drives for lower heat
• You want a brand-new drive instead of renewed

Verdict: MFerraz 6TB 7200RPM Enterprise HDD offers solid enterprise specs for users needing reliable 24/7 storage in RAID arrays, though its 6TB capacity is smaller than many competitors.

5 Best premium

Seagate Exos X16 14TB Renewed Hard Drive

Best for: high-capacity enterprise storage needs

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 Seagate Exos X16 offers 14TB of storage in a 3.5-inch form factor. It runs at 7200 RPM with a 256MB cache and uses a SATA 6Gb/s interface. The drive is certified with zero hours of usage and includes a 2-year warranty. It suits users needing high capacity and performance for data center or enterprise environments.

Pros

• 14TB storage capacity
• 7200 RPM rotational speed
• 256MB cache size
• SATA 6Gb/s interface
• 2-year warranty included

Cons

• Renewed condition
• Heavier build than smaller drives
• Enterprise-focused design

Good fit if

• You need high-capacity storage for enterprise use
• You want a 256MB cache for better performance
• You prefer a 2-year warranty

Skip if

• You need a brand new drive
• You require a smaller form factor
• You are looking for consumer-grade features

Verdict: Seagate Exos X16 14TB Enterprise HDD is a solid choice for users needing high-capacity, high-performance storage in a renewed condition with a 2-year warranty.

6 Also great

HGST Ultrastar He10 10TB Enterprise Hard Drive

Best for: Helium-filled NAS arrays needing 7200 RPM

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

This HGST Ultrastar He10 drive offers 10TB of storage in a 3.5-inch form factor. It spins at 7200 RPM and includes 256MB of cache. The HelioSeal technology reduces vibration and extends lifespan. You get a SATA 6Gb/s interface for reliable data transfer. This enterprise-grade drive suits users needing high performance and helium-filled durability for their NAS systems.

Pros

• 10TB storage capacity
• 7200 RPM rotational speed
• 256MB cache size
• HelioSeal helium technology

Cons

• 10TB capacity is lower than 12TB and 14TB alternatives
• SATA interface is slower than SAS options
• No included software or warranty details in data

Good fit if

• You need helium-filled drive reliability
• You want 7200 RPM performance
• You require 256MB cache for enterprise tasks

Skip if

• You need more than 10TB capacity
• You prefer SAS connectivity
• You want included warranty support

Verdict: HGST He10 10TB Enterprise HDD is a solid choice for users prioritizing helium sealing and rotational speed over maximum capacity. It fits well in dense NAS arrays where vibration control matters.

7

MDD 14TB 7200 RPM 3.5-Inch Hard Drive

Best for: High-capacity enterprise storage

Storage Capacity

14TB

Form Factor

3.5-inch

Hardware Interface

SATA 6.0Gb/s

Rotational Speed

7200RPM

Cache Size

256MB

Dimensions

5.8 × 4 × 1 inches

View on Amazon: MDD 14TB 7200 RPM 3.5-Inch Hard Drive Affiliate link

This MDD drive offers 14TB of storage in a 3.5-inch form factor. It runs at 7200 RPM with a 256MB cache and uses SATA 6.0Gb/s. The unit is rated for 24/7 operation with a 2.0M hour MTBF. It suits users needing high-density storage for data centers or NAS systems. The drive includes a 5-year warranty.

Pros

• 14TB storage capacity
• 7200 RPM rotational speed
• 256MB cache size
• 2.0M hour MTBF rating

Cons

• Bare drive only with no accessories
• Requires manual formatting on setup
• Heavier than some competitors

Good fit if

• You need maximum capacity per drive
• You require high rotational speed
• You run 24/7 enterprise workloads

Skip if

• You want a pre-configured unit
• You need silent operation
• You prefer smaller form factors

Verdict: MDD 14TB 7200RPM Enterprise HDD delivers raw performance for heavy storage tasks. It fits users who prioritize capacity and speed over included accessories.

Specifications side by side

Frequently asked questions

See also

• asus asus alternatives
• karcher karcher alternatives