Western Digital Red Plus Hard Drive is our top choice for the Best 10TB Hard Drives because it balances reliable 24/7 NAS performance with optimized firmware for multi-bay environments. The Seagate IronWolf Hard Drive follows as a strong alternative for users prioritizing high-speed data transfer and health management, while the Seagate Exos X10 Hard Drive serves as the go-to solution for heavy-duty enterprise-grade reliability.
Selecting the right drive requires balancing your specific workload against the drive's intended design. While enterprise drives offer higher endurance for continuous operation, NAS-specific models provide better compatibility for home and small business storage arrays. Desktop-focused drives may offer different cache configurations that prioritize burst performance over sustained multi-user access.
If you require portable storage instead of an internal solution, our guide to the Best 10TB External Hard Drive covers the most reliable plug-and-play options for backing up your data.
10 Best 10TB Hard Drives in 2026 Reviews
Quick Comparison
| Product | Best For | Key Strength | Score |
|---|---|---|---|
| Western Digital Red Plus Hard Drive | Best Overall | NASware firmware ensures optimized compatibility for multi-bay NAS systems. | 4.9 |
| Seagate IronWolf Hard Drive | Built for 24/7 NAS usage | AgileArray technology optimized for RAID and multi-bay NAS environments. | 4.5 |
| Seagate Exos X10 Hard Drive | Enterprise-grade reliability | Helium-sealed design reduces power consumption and weight. | 4.4 |
| Western Digital Black Hard Drive | Performance for gaming systems | High 10TB capacity for extensive game libraries and creative assets. | 4.6 |
| Western Digital Blue Hard Drive | Reliable for everyday computing | Massive 10TB capacity for extensive data storage. | 4.4 |
| Western Digital Elements Desktop Drive | Simple plug-and-play storage | Massive 10TB capacity for extensive file storage | 4.5 |
| Seagate Enterprise Capacity Hard Drive | Heavy-duty data center solution | 2.5M-hour MTBF rating for enterprise-class reliability. | 4.4 |
| MDD HGST DC HC510 Hard Drive | High-density server storage | High-density 10TB capacity for large-scale data storage. | 4.3 |
| MDD NAS Internal Hard Drive | Efficient for cloud data centers | 10TB high-density capacity ideal for hyperscale and NAS environments. | 4.7 |
| Seagate Enterprise Capacity Renewed Drive | Budget-friendly enterprise choice | Enterprise-class reliability with a 2.5M-hr MTBF rating. | 4.3 |
How We Chose
To identify the most capable 10TB hard drives, we evaluate each model based on its intended operational environment, whether that is a home NAS, a high-density server, or a standard desktop. Our review process prioritizes technical specifications that dictate long-term stability and data integrity under sustained, real-world storage demands.
- Workload Rating: Assessing the annual data transfer capacity to ensure the drive matches your usage intensity.
- Compatibility: Verifying support for NAS-specific firmware or enterprise RAID controllers.
- Performance Specifications: Evaluating RPM, cache size, and sustained transfer rates for data-heavy tasks.
- Reliability Features: Checking for vibration sensors, MTBF ratings, and specialized error recovery controls.
- Warranty and Support: Comparing manufacturer coverage periods and data recovery service inclusions.
1 Western Digital Red Plus Hard Drive — Optimized for NAS environments
Reliability in a 24×7 business environment is the primary focus of the Western Digital 10TB WD Red Plus NAS Internal Hard Drive HDD, which is engineered specifically for use in small to medium business NAS systems. This drive distinguishes itself through the integration of NASware firmware, which is purpose-built to ensure seamless compatibility and optimized performance when operating within multi-bay enclosures.
Designed to handle the rigors of continuous operation, this drive supports an annualized workload rate of up to 180 TB/yr. This capacity for data transfer is essential for environments where constant access and high-volume data management are standard requirements. The drive utilizes CMR (Conventional Magnetic Recording) technology, providing a stable foundation for data integrity in demanding storage configurations.
The hardware is built to support systems with up to 8 bays, offering scalability for growing storage needs. With a 7200 RPM spindle speed and a 512 MB cache, the drive is tuned for responsive data handling. It connects via a SATA 6 GB/s interface, ensuring that the physical connection keeps pace with the internal processing capabilities of the drive.
Maintenance and longevity are supported by a 3-year limited warranty, providing a clear service window for business deployments. Unlike standard desktop-grade hardware, this model undergoes specific testing for NAS compatibility, minimizing the risk of integration issues during initial setup or system expansion.
Best for: Small to medium business NAS environments requiring 24×7 reliability and compatibility with up to 8-bay systems.
Skip if: Users seeking a drive for high-performance desktop gaming or single-drive workstations may find the NAS-specific firmware and workload optimizations unnecessary for their use case.
- NASware firmware ensures optimized compatibility for multi-bay NAS systems.
- Supports a robust 180 TB/yr workload rate for continuous operation.
- Utilizes CMR technology for reliable data management.
- Specifically tested for 24×7 business environments.
- Limited to 3-year warranty coverage compared to some enterprise-class drives.
- Performance is optimized for NAS enclosures rather than general-purpose desktop speed.
2 Seagate IronWolf Hard Drive — Built for 24/7 NAS usage
Reliable data storage for 24/7 network-attached storage environments requires hardware built specifically for continuous operation. The Seagate IronWolf 10TB NAS Internal Hard Drive addresses this demand by integrating AgileArray technology, which optimizes the drive for RAID configurations through dual-plane balancing and advanced error recovery controls.
This drive features a 7200 RPM spindle speed paired with a 256MB cache, facilitating sustained data transfer rates up to 210MB/s. Designed to handle multi-user workloads of up to 180TB per year, it utilizes CMR (Conventional Magnetic Recording) technology to ensure consistent write performance, which is essential for maintaining data integrity in complex NAS arrays.
Built for longevity, the drive includes RV (Rotational Vibration) sensors to mitigate performance degradation in multi-bay enclosures. It is rated for 1 million hours MTBF and 600,000 load/unload cycles. Furthermore, Seagate includes a 3-Year Rescue Data Recovery Service, which provides an industry-leading 95% recovery success rate should data loss occur.
While the high-performance specifications make this drive suitable for demanding NAS tasks, users should ensure their system cooling is adequate for a 7200 RPM drive. The inclusion of specialized firmware and recovery services positions this model as a robust solution for users prioritizing data availability and system uptime.
Best for: Small to medium-sized business NAS systems requiring reliable 24/7 operation and high-capacity data management.
Skip if: Users seeking a silent, low-power drive for basic desktop storage or occasional backups may find the 7200 RPM performance and NAS-specific features unnecessary.
- AgileArray technology optimized for RAID and multi-bay NAS environments.
- CMR technology ensures consistent performance for heavy write workloads.
- Includes 3-Year Rescue Data Recovery Service for added peace of mind.
- Integrated RV sensors to maintain stability in multi-drive systems.
- Higher power consumption and heat output compared to 5400 RPM drives.
- Audible operation due to the 7200 RPM spindle speed.
3 Seagate Exos X10 Hard Drive — Enterprise-grade reliability
The Seagate Exos X10 ST10000NM0126 is engineered for high-density storage environments, utilizing a helium-sealed design to minimize weight and power consumption while maximizing capacity. This 10TB drive is built for hyperscale data centers and enterprise-grade backup systems where continuous, reliable performance is required.
Designed for seamless integration, the drive features a SATA 6Gb/s interface and a 7,200 RPM spindle speed, delivering a sustained transfer rate of 249 MB/s. Its 512e sector format ensures broad compatibility with existing enterprise infrastructure and modern storage controllers without requiring additional hardware modifications.
Reliability is central to the Seagate Exos X10 architecture, which includes digital environmental sensors that monitor internal pressure, temperature, and humidity. These sensors work alongside advanced error correction and intelligent power management to maintain stability in demanding, high-density RAID arrays and distributed file systems like Ceph or Hadoop.
With a 2.5 million hour MTBF and a 550TB/year workload rating, this drive is rated for continuous 24/7 operation. The inclusion of a 256MB cache further supports efficient data handling in mission-critical environments, providing the sustained uptime necessary for large-scale deployments.
Best for: Enterprise-grade, high-density storage deployments and hyperscale data centers requiring 24/7 reliability.
Skip if: Home users or standard desktop PC owners who do not require enterprise-specific features like 512e sector formatting or 24/7 server-grade workload ratings.
- Helium-sealed design reduces power consumption and weight.
- High 550TB/year workload rating for mission-critical environments.
- Broad compatibility with enterprise server platforms via SATA 6Gb/s.
- Integrated digital environmental sensors for optimized reliability.
- Enterprise-focused architecture may be overkill for standard consumer use cases.
- Requires specific 512e compatible controllers for optimal integration.
4 Western Digital Black Hard Drive — Performance for gaming systems
Managing massive datasets or high-fidelity game libraries requires storage that balances capacity with rapid data access. The WD Western Digital 10TB WD_Black Performance Internal Hard Drive HDD is engineered specifically for gamers, system builders, and creative professionals who demand high-capacity storage without sacrificing responsiveness.
This 3.5-inch drive operates at 7200 RPM and utilizes a 512 MB cache to facilitate faster read and write operations. To maintain data integrity and consistent performance during heavy workloads, the drive incorporates Western Digital’s StableTrac and Dynamic Cache Technology. These features are designed to optimize performance and increase reliability during intensive use.
The drive connects via a SATA 6 Gb/s interface, ensuring compatibility with standard desktop configurations. With its 10TB capacity, it provides a substantial footprint for large-scale projects or extensive software installations. The unit measures 7.56 inches in length and 5.04 inches in width, fitting standard internal drive bays.
As a performance-oriented component, this drive is backed by a 5-year limited warranty, reflecting its intended use in demanding environments. It is a specialized solution for those who need to house large files locally while maintaining the speed necessary for modern desktop applications.
Best for: Gamers, system builders, and creative professionals who require high-capacity, high-performance local storage for large files and applications.
Skip if: Users seeking silent operation or those who require the extreme transfer speeds of NVMe SSDs for OS boot drives should look elsewhere.
- High 10TB capacity for extensive game libraries and creative assets.
- 7200 RPM spindle speed combined with a large 512 MB cache for improved responsiveness.
- StableTrac and Dynamic Cache Technology to enhance reliability and performance optimization.
- 5-year limited warranty providing long-term support for professional and gaming builds.
- Mechanical HDD architecture inherently slower than modern NVMe or SATA SSDs.
- Physical footprint requires standard 3.5-inch desktop drive bay compatibility.
5 Western Digital Blue Hard Drive — Reliable for everyday computing
The Western Digital 10TB WD Blue Internal Hard Drive provides a substantial storage foundation for everyday computing needs, offering a massive 10TB capacity in a standard 3.5-inch form factor. This drive is engineered for reliability and consistent performance, making it a straightforward choice for users looking to expand their local storage footprint without complex configurations.
Built with a 7200 RPM spindle speed and a 512 MB cache, this drive is designed to handle data-intensive tasks efficiently. The SATA 6 Gb/s interface ensures broad compatibility with most desktop systems, while the inclusion of free Acronis True Image WD Edition cloning software simplifies the process of migrating data from an existing drive to this high-capacity unit.
As part of the WD Blue series, this model emphasizes the core Western Digital quality and reliability standards expected in personal computing environments. It is a practical solution for those who require significant space for large file libraries, backups, or media collections, backed by a 2-year limited warranty.
While this drive excels in general-purpose storage, users should verify their system's physical bay availability for a 3.5-inch drive and ensure their power supply and SATA controller can support high-capacity mechanical hard drives. It is a robust, no-nonsense component for those prioritizing capacity and brand-backed stability.
Best for: Users needing high-capacity internal storage for desktop computing, backups, and large file management.
Skip if: Users requiring a drive for high-performance server environments or those who only have space for 2.5-inch drives in a laptop.
- Massive 10TB capacity for extensive data storage.
- 7200 RPM performance for responsive data access.
- Includes Acronis True Image cloning software for easy data migration.
- Reliable Western Digital build quality.
- Requires a 3.5-inch drive bay which may not be available in all compact cases.
- Mechanical HDD architecture is slower than SSD alternatives for boot drive applications.
6 Western Digital Elements Desktop Drive — Simple plug-and-play storage
Expanding your digital storage capacity requires a reliable solution that balances high-density space with straightforward operation. The Western Digital 10TB Elements Desktop External Hard Drive provides a massive 10TB of storage, making it a suitable choice for users looking to offload large libraries of personal files, backups, or media collections without complex configuration.
Engineered for simplicity, this drive features a plug-and-play design that works immediately with Windows PCs. It utilizes USB 3.0 connectivity to facilitate fast data transfers, ensuring that moving large volumes of information between your computer and the drive remains efficient. The unit is housed in a compact, durable enclosure that measures approximately 6.53 inches in height and 5.31 inches in length.
While the drive is pre-formatted for Windows environments, it remains versatile for other operating systems provided the user performs a reformat. This Western Digital 10TB Elements Desktop External Hard Drive includes a 2-year limited warranty, reflecting the manufacturer's commitment to quality inside and out. Its straightforward, black-finish aesthetic allows it to blend into most workspace environments without occupying excessive desk space.
When integrating this drive into your workflow, consider that it requires an external power source, which is standard for desktop-class storage of this capacity. This design choice ensures consistent power delivery for the internal drive mechanism, prioritizing stability over the portability of smaller, bus-powered drives.
Best for: Users needing a high-capacity, plug-and-play storage solution for personal file backups and media libraries on Windows systems.
Skip if: Users requiring a portable, bus-powered drive for travel or those who need a drive pre-formatted for macOS without performing a manual reformat.
- Massive 10TB capacity for extensive file storage
- Plug-and-play compatibility with Windows PCs
- Fast USB 3.0 data transfer speeds
- Compact desktop footprint
- Requires reformatting for use with Mac systems
- Requires external power connection
7 Seagate Enterprise Capacity Hard Drive — Heavy-duty data center solution
The Seagate Enterprise Capacity Hard Drive (ST10000NM0016) is engineered for demanding environments that require consistent, 24/7 operational reliability. With a substantial 10TB capacity and a 7200 RPM rotation speed, this 3.5-inch internal drive is built to handle the intensive data throughput found in data centers, surveillance systems, and NAS configurations.
Designed for long-term endurance, this enterprise-class HDD features a 2.5 million-hour Mean Time Between Failures (MTBF) rating. The drive utilizes a 256MB buffer to optimize data management and transfer efficiency, supporting high-density storage needs. It connects via a SATA 6.0Gb/s interface, ensuring compatibility with standard enterprise and desktop storage architectures.
This unit is provided as a bare drive in a brown box, meaning users must supply their own mounting screws, cables, and necessary accessories. It is important to note that the drive requires manual formatting within the host system to be properly detected and initialized for storage operations.
Backed by a 5-year seller warranty, this drive offers a robust solution for users prioritizing high-capacity storage and heavy-duty performance. It is a specialized component intended for professional or scaled environments where continuous uptime is a primary requirement.
Best for: Professional data centers, surveillance systems, and NAS environments requiring 24/7 high-capacity storage reliability.
Skip if: Casual home users who do not require enterprise-grade endurance or those who prefer a plug-and-play drive that includes mounting hardware and cables.
- 2.5M-hour MTBF rating for enterprise-class reliability.
- 10TB high-capacity storage for scaled environments.
- 7200 RPM rotation speed with a 256MB buffer for efficient data handling.
- 5-year seller warranty included.
- Bare drive only; requires separate purchase of mounting screws, cables, and accessories.
- Manual formatting required on the host system for initial detection.
8 MDD HGST DC HC510 Hard Drive — High-density server storage
The MDD HGST DC HC510 Hard Drive is engineered for high-density storage environments, offering a substantial 10TB capacity designed to handle 24/7/365 heavy-duty workloads. This enterprise-grade drive features a 7200RPM spindle speed and a 256MB cache, providing the necessary throughput for demanding data-intensive applications.
Built for versatility, this drive integrates into a wide variety of systems, including SATA servers, NAS configurations, RAID arrays, and surveillance setups like CCTV DVRs. Its robust construction is reflected in a 2.5-million-hour mean time between failures (MTBF) rating, emphasizing its suitability for continuous operation in professional or home-lab environments.
This unit is a bare drive, meaning it arrives as a single pack without mounting screws, cables, or additional accessories. Users should note that the drive requires manual formatting within their operating system to be correctly detected and initialized for storage use.
With a 3.5-inch form factor and SATA 6.0Gb/s interface, the drive is compatible with standard desktop and server chassis. It serves as a reliable solution for those requiring significant data capacity without the overhead of consumer-grade hardware, backed by a 5-year warranty from the reseller.
Best for: This drive is best for users building high-capacity NAS, RAID, or server storage arrays that require 24/7 reliability.
Skip if: Skip this drive if you require a retail-packaged product that includes mounting hardware, SATA cables, or pre-formatted software.
- High-density 10TB capacity for large-scale data storage.
- Enterprise-grade 24/7/365 reliability with a 2.5M-hour MTBF.
- Broad compatibility with NAS, RAID, and surveillance systems.
- Fast 7200RPM performance with a 256MB cache.
- Bare drive only; no cables or mounting hardware included.
- Requires manual formatting upon installation for system detection.
9 MDD NAS Internal Hard Drive — Efficient for cloud data centers
The MDD MAXDIGITALDATA 2021 MDD (MDD10TSATA25672NAS) is a high-density 10TB hard disk drive engineered for demanding storage environments. Its 3.5-inch form factor is specifically optimized for hyperscale applications and cloud data centers where maximizing storage efficiency within a limited physical footprint is essential.
Performance is driven by a 7200RPM spindle speed and a 256MB cache, which work in tandem to facilitate rapid data retrieval. This configuration is well-suited for high-workload environments such as NAS systems, RAID arrays, and continuous-operation surveillance setups like CCTV DVRs, ensuring consistent throughput for large data sets.
Connectivity is managed via a 6Gb/s SATA interface, providing the necessary bandwidth for reliable data integrity and system scalability. This interface ensures the drive remains compatible with a wide range of enterprise-grade network storage solutions as well as standard desktop PC and Mac environments.
As a bare drive, this unit does not include mounting hardware, cables, or additional accessories. Buyers should be aware that the drive requires manual formatting within the host operating system before it can be detected or utilized for storage, representing a necessary step for users managing their own hardware configurations.
Best for: Users requiring high-capacity, NAS-optimized storage for RAID arrays, surveillance systems, or cloud data center applications.
Skip if: Users who prefer a plug-and-play experience including mounting hardware and pre-formatted software, as this is a bare drive that requires manual setup.
- 10TB high-density capacity ideal for hyperscale and NAS environments.
- 7200RPM spindle speed paired with a 256MB cache for efficient data retrieval.
- SATA 6.0Gb/s interface ensures high data integrity and scalability.
- Versatile compatibility across NAS, RAID, surveillance, and desktop systems.
- Bare drive configuration requires separate purchase of mounting hardware and cables.
- Manual formatting is required before the drive is recognized by the host system.
10 Seagate Enterprise Capacity Renewed Drive — Budget-friendly enterprise choice
Managing massive datasets requires hardware built for consistent, high-intensity workloads, and the Seagate Enterprise Capacity | ST10000NM0016 | 10TB 7200 RPM SATA 6.0Gb/s 256MB Cache Hyperscale 512e 3.5" Hard Disk Drives (Renewed) is engineered specifically for such environments. This drive is designed for 24/7 operation, featuring an enterprise-class reliability rating with a 2.5M-hr MTBF, making it a robust choice for data centers, NAS systems, and surveillance setups. By utilizing a 7200RPM rotation speed paired with a 256MB buffer size, the drive facilitates efficient data handling and high-speed throughput, which is essential for environments where data is constantly being written or retrieved.
As a high-capacity 10TB unit, this drive provides the necessary storage density for scaled capacity environments. The 512e format ensures compatibility across various legacy and modern systems, while the enterprise-grade construction prioritizes long-term stability. This specific renewed model is verified for zero bad sectors and 100% health, ensuring it meets the rigorous demands of heavy-duty, continuous usage without the premium cost associated with new enterprise hardware.
Installation requires a straightforward approach: as a bare drive, it arrives in a brown box without additional mounting hardware or cables. Users should note that the drive must be formatted within their operating system to be properly detected and displayed. While this provides a cost-effective entry point into enterprise-tier storage, buyers should be aware that the 90-day limited warranty is shorter than that of a new retail drive, representing a trade-off between initial acquisition cost and long-term manufacturer support.
Best for: Enterprise-grade storage, NAS systems, and surveillance environments requiring 24/7 reliability and high-capacity data management.
Skip if: Users who require a plug-and-play solution with included mounting hardware, cables, or a full manufacturer retail warranty.
- Enterprise-class reliability with a 2.5M-hr MTBF rating.
- Designed for 24/7 continuous operation.
- High-density 10TB capacity for large-scale data environments.
- Verified zero bad sectors and 100% health status.
- Bare drive only; does not include mounting screws or SATA cables.
- Requires manual formatting on the host system to be recognized.
- Limited 90-day warranty period.
Best 10TB Hard Drives Buying Guide
NAS vs. Enterprise Drives
Network Attached Storage (NAS) drives are engineered to handle the unique vibrations and heat generated in multi-drive enclosures. They often include specialized firmware to ensure the drive remains responsive during RAID rebuilds and error correction cycles.
Enterprise drives are built for the most demanding 24/7 environments, often featuring higher workload ratings and advanced sensors to monitor internal conditions. While they offer superior durability, they may operate with higher power consumption or noise levels compared to consumer-grade NAS units.
The Role of CMR Technology
Conventional Magnetic Recording (CMR) is the standard for reliable data storage in high-capacity drives. Unlike SMR (Shingled Magnetic Recording), CMR drives maintain consistent write performance, which is critical for RAID arrays where parity calculations require predictable drive behavior.
When shopping for 10TB capacities, confirming the use of CMR is essential for avoiding performance degradation during sustained file transfers. Most professional-grade and NAS-optimized drives in this class utilize CMR to ensure compatibility with standard storage controllers.
Workload and Reliability Metrics
The annualized workload rating indicates how much data a drive is designed to move per year. For home users, a standard 180TB/year rating is typically sufficient, whereas enterprise environments often require drives rated for 550TB/year to handle constant read/write cycles.
Mean Time Between Failures (MTBF) provides a statistical look at expected lifespan. While no drive is immune to failure, higher MTBF ratings and the inclusion of vibration sensors suggest a design focused on minimizing mechanical stress over long periods of operation.
Cache and Performance
A larger cache, such as 256MB or 512MB, allows the drive to manage data requests more efficiently by staging information before it is written to the platters. This is particularly beneficial for systems handling multiple concurrent users or frequent small file operations.
While RPM speed is a common performance metric, the integration of cache technology and firmware optimization often matters more for NAS stability. A 7200 RPM drive generally provides faster access times, but it must be balanced against the heat management capabilities of your specific storage enclosure.
Warranty and Data Recovery
Warranty periods serve as a strong indicator of a manufacturer's confidence in their hardware. A three-year warranty is standard for many NAS drives, while enterprise-class models often extend this to five years to reflect their intended mission-critical use.
Some manufacturers include value-added services like data recovery plans. These can be a significant benefit, providing a safety net that simplifies the process of retrieving information in the event of a drive failure, though they should not replace a robust local and off-site backup strategy.
Frequently Asked Questions
Can I use an enterprise drive in my home NAS?
Yes, enterprise drives are generally compatible with NAS systems, though you should ensure your enclosure has adequate cooling, as these drives can run hotter than standard desktop models.
What is the difference between 512e and 4Kn sector formats?
512e (emulation) is designed for broader compatibility with older operating systems and controllers, while 4Kn (native) is optimized for modern systems. Most 10TB drives use 512e to ensure they work across a wide range of hardware.
Do I need to reformat a new drive before use?
Yes, most internal hard drives ship as raw storage and must be initialized and formatted through your operating system's disk management utility before they will appear as usable space.
Is a 7200 RPM drive necessary for a home media server?
While 5400 RPM drives are quieter and run cooler, 7200 RPM drives offer faster data access, which can be beneficial if you are streaming high-bitrate media or accessing large files frequently.
How do I know if my drive is CMR or SMR?
Most high-capacity NAS and enterprise drives, such as the WD Red Plus or Seagate IronWolf, are explicitly marketed as CMR. If a drive's technical specifications do not mention CMR, it is safer to verify the model number on the manufacturer's website.
Conclusion: Our Top Pick
Our top pick is Western Digital Red Plus Hard Drive. Choosing the right 10TB hard drive depends on your specific environment, with NAS-optimized drives offering the best balance for home arrays and enterprise models providing the endurance needed for heavy-duty servers. Always check your enclosure's compatibility and cooling capacity before selecting a high-performance 7200 RPM model.
Regardless of the drive you choose, remember that no hard drive is a substitute for a comprehensive backup strategy. Ensure your data is replicated across multiple locations to protect against hardware failure, accidental deletion, or other unforeseen data loss events.