HDD

Hard disk drives for high-capacity data storage.

Rankings

1. 1. Exos X20 (ST20000NM000D) - Seagate Enterprise HDD

   Enterprise 20TB HDD for scalable storage

   Exos X20 is Seagate's 20TB enterprise-class dynamic nearline drive built for cloud-scale deployments. It leverages conventional magnetic recording (CMR) to deliver steady, predictable performance in dense data-center environments. The drive supports SATA and SAS variants and carries a 5-year warranty with enterprise-grade reliability. In 2025, Exos X20 remains a staple for hyperscale storage fleets and large NAS/SAN arrays where density and reliability matter. Compared with consumer disks, this line emphasizes long-term RW stability, rich warranty terms, and robust service options for data centers and large-scale operations.

   Rated 4.6

2. 2. Exos X24 (ST24000NM002H) - Seagate Enterprise HDD

   CMR 24TB nearline HDD for hyperscale storage

   Exos X24 is Seagate’s 24TB enterprise-grade HDD designed for hyperscale and data-center workloads. Built on a high-areal-density platform, it offers strong sequential performance, a 2.5M-hour MTBF, and a 5-year warranty. X24 has been widely adopted in cloud data centers and large-scale NAS/SAN deployments where density and reliability are critical. It competes with other 24TB enterprise HDDs and is backed by Seagate's enterprise support ecosystem, including diagnostic tools and data recovery options. As part of Seagate’s HAMR/Mozaic platform evolution, X24 remains a mainstay for customers needing bulk storage with predictable performance characteristics.

   Rated 4.8

3. 3. IronWolf Pro 24TB NAS Hard Drive (ST24000NT002)

   RAID-ready NAS drive for multi-user environments

   IronWolf Pro 24TB is Seagate's high-end NAS drive designed for 24/7 multi-user NAS environments. It offers AgileArray features, 550TB/year workload rating, TLER, RV sensors, and a 5-year warranty with Rescue Data Recovery Services. It's a go-to choice for SMB NAS arrays, video editing workgroups, and collaborative storage solutions where reliability, multi-user performance, and RAID stability matter most. In 2025, IronWolf Pro remains a trusted NAS workhorse across small to mid-sized deployments, balancing capacity, reliability, and vendor support.

   Rated 4.6

4. 4. BarraCuda 3.5" 24TB Desktop HDD (ST24000DM001)

   High-capacity desktop HDD for mainstream storage

   BarraCuda 24TB is Seagate’s large-capacity desktop HDD designed for general-purpose storage, backups, and media libraries. It uses Conventional Magnetic Recording (CMR) for reliable performance across large sequential transfers and is commonly sold through consumer electronics retailers. With 24TB per drive, it delivers a strong price-per-terabyte ratio for home and small-office storage needs. It is supported by SeaTools and DiscWizard, but is not primarily targeted at enterprise NAS workloads where higher endurance and RAID features are critical.

   Rated 4.5

5. 5. WD Ultrastar DC HC560 (20TB) - Enterprise HDD

   OptiNAND-enabled 20TB enterprise HDD for hyperscale storage

   WD Ultrastar DC HC560 is a 20TB enterprise-class HDD featuring OptiNAND technology, designed for hyperscale cloud and data-center workloads. It supports up to 550TB/year workload, 2.5M hours MTBF, and a 5-year warranty. Built to operate in always-on environments, HC560 is part of WD’s Ultrastar data-center line intended for bulk storage, distributed filesystems, and scale-out archives. Availability across global data-center channels ensures broad language support and international service options, making HC560 a solid choice for large-scale deployments that require dense capacity with enterprise reliability.

   Rated 4.6

6. 6. WD Red Pro 20TB NAS Hard Drive (WD201KFGX)

   NAS-optimized 20TB drive for RAID ensembles

   WD Red Pro 20TB NAS HDD is designed for high-demand NAS deployments in medium-to-large RAID environments. It leverages OptiNAND and RV sensors for vibration tolerance, with a 5-year warranty and 550TB/year workload rating. This drive targets business NAS systems with many bays, aiming to deliver reliable archiving and file sharing at scale. Availability is global across major distributors, with broad language and service support for international customers.

   Rated 4.5

7. 7. Toshiba X300 Pro 22TB - Pro Performance Desktop HDD

   High-capacity 22TB desktop HDD for creative work

   Toshiba X300 Pro 22TB is a high-performance 3.5-inch HDD designed for creators, editors, and demanding desktop workloads. It offers 7200 RPM, up to 512MB cache, 22TB capacity, and excellent sustained transfer characteristics. The X300 Pro family is marketed for workstations and content-creation rigs requiring large local storage with reliable, consistent performance. In 2025 it remains a popular option for professionals needing substantial on-disk assets with predictable behavior and strong warranty coverage.

   Rated 4.6

8. 8. Toshiba N300 Pro 20TB NAS HDD (HDWG62AUZSVB)

   NAS-oriented 20TB drive for 24x7 operation

   Toshiba N300 Pro 20TB NAS HDD is built for continuous NAS operation with up to 24 bays and a 300TB/year workload rating. It offers 7200 RPM, 512MB cache, and CMR recording to support reliable multi-user NAS deployments. The N300 Pro family targets medium-to-large business NAS environments, providing robust endurance and vibration resistance for RAID arrays and bulk archives. In 2025 it remains a staple option for professionals needing dependable, dense NAS storage on a budget relative to some enterprise lines.

   Rated 4.4

9. 9. SkyHawk AI 20TB - Seagate Surveillance HDD

   AI-enabled surveillance HDD up to 20TB

   SkyHawk AI drives are Seagate's line designed for NVRs with AI workloads. The 20TB variant supports ImagePerfect AI, up to 64 HD camera streams and 32 AI streams, and includes SkyHawk Health Management and a 3-year Rescue Data Recovery Services plan. Built for 24/7 operation, these drives balance capacity, reliability, and analytics-friendly firmware for surveillance ecosystems, with broad compatibility across major NVR platforms.

   Rated 4.5