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Smooth integration with your Windows Environment
Buffalo’s WS5020 Windows Server IoT TeraStations are network-attached storage (NAS) devices purpose-built as efficient data storage and backup solutions for small businesses.
The WS5020 runs Windows Server IoT 2019 for Storage Standard Edition, a binary equivalent of the Windows Server 2019 operating system that is made specially for NAS devices and offers full Windows Server 2019 functionality. The WS5020 acts as a file server built with Windows Server 2019, leveraging the Windows Server operating system to optimize file server functions, centralize and organize stores, and protect stored data, all through the same familiar Windows Server-based interface.
The WS5020 NAS hardware is made in Japan and is TAA compliant. Built with business-class components to provide stable 24/7 operation, WS5020 includes 8GB ECC memory to stabilize performance as well as native 10GbE to eliminate network bottlenecks and shorten data backup times. As with our other TeraStation products, the WS5020 comes with hard drives included and 24/7, US-based support.


Buffalo Americas is a leading provider of easy-to-use technology solutions and reliable pre- and post-sales support with over 45 years in existence.
We build top-quality storage, networking, and other technology-related solutions that simplify your experience and deliver a solid return on your investment.
Our network attached storage (NAS) devices are installed with pre-tested hard drives that eliminate the hassle of sourcing and testing drives, saving you time and money.
- Pre-tested NAS-grade hard drives included with RAID pre-configured
- Made in Japan/TAA Compliant
TeraStation WS5020 - Windows Server IoT 2019
The TeraStation NAS offers flexibility to be used as you see fit, such as acting as a multi-purpose file server, a central backup hub for all your files (including backing up to and from cloud services), being set up as a NVR server for security cameras, or serving as a subscription-free backup and disaster recovery (BDR) appliance.
- Native Windows Server IoT 2019 for Storage Standard Edition.
- No CAL (Client-Access Licenses) required for low-cost deployment and effortless integration into existing Windows environments.
- Cloud service integration with Azure, OneDrive, and other Microsoft-compatible services enables to create a hybrid cloud for additional security and flexibility.
- Supports a variety of data backup features (Shadow Copy, Azure Backup, replication, iSCSI).
- DFS Replication and Storage Replica enable stable data replication between servers for smooth aggregate data backup.
- Native 10GbE port/8GB ECC memory for efficient data transfers and file operations.
- Includes NovaBACKUP software license(s) for versatile, professional-level server and PC backups.
- 3-year product support and replacement with 24/7 North America-based support and Simple Logical Data Recovery service qualification when product is registered.
Full Windows Server Operating System
Windows Server IoT 2019 provides the full capabilities of Windows Server 2019, and offers a host of tried-and-true data management, archiving, and security features in order to make file storage and backup effortless, all through the same familiar Windows Server interface.
WS5020 also supports Microsoft services such as Azure and OneDrive, as well as other Microsoft-compatible cloud services so you can effortlessly store, back up, and manage your data as you see fit.
Low-Cost Deployment
Compared to building a file server running Windows Server from scratch, the WS5020 can significantly reduce product costs.
Unlike Windows Server, Windows Server IoT does not require CALs (Client Access Licenses). You can have any number of users access the NAS without needing to pay additional costs.
Whether you are replacing an aging NAS or installing a new on-site storage or backup server, you can easily integrate the Buffalo Windows Server IoT NAS into an existing Windows environment without hassle.
Unmatched Flexibility
WS5020 offers peerless flexibility as storage or backup for your business. You can integrate any Windows product, service, or platform you are already using for smooth and effortless transition.
Advanced file services in Windows Server 2019 enable the WS5020 to serve a variety of needs, including dedicated iSCSI target, offline backup server, surveillance server for a network of security cameras, or hybrid configurations with Azure for secure remote access.
Secure File Server Features
With Active Directory support, user management is centrally managed by the server. If you need to manage hundreds of users with your NAS, the WS5020 offers smoother and quicker response, along with granulated access control.
WS5020 offers efficient data management and backup protection for clients and servers.
Native Storage Migration Service support enables simple data migration to WS5020, and Data Deduplication to remove duplicate data and increase data storage capacity to enhance performance.
Robust Backup Features
WS5020 supports a variety of data backup features utilizing cloud backup or iSCSI for offline data backup.
Native Windows Server features such as DFS replication and Storage Replica to replicate data across servers and Shadow Copy to create image backups.
You can also set up the NAS as an offline replication backup location and bypass cloud storage costs.
Peace of Mind with Buffalo Services
Hard Drives Included
WS5020 ships with pre-tested NAS-grade hard drives included for minimal hassle setup. The unit will also have RAID pre-configured for out-of-the-box data protection.
Peace of Mind with Buffalo Services
WS5020 comes with a 3-year product support and replacement service on all components, including hard drives, along with an optional 5-year extension available for all registered products.
The unit also qualifies for Buffalo’s Simple Logical Data Recovery service as well as 24/7, US-based support.
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Customer Reviews |
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Special Features | Versatile file server and data backup device with native Windows Server IoT 2019 operating system | Versatile file server and data backup device with native Windows Server IoT 2019 operating system | Full-scale professional NAS, Snapshot, Cloud Integration, VMWare, Hyper-V |
Operating System | Windows Server IoT 2019 | Windows Server IoT 2019 | TeraStation OS |
Number of Drives Pre-Installed | 2 | 4 | 4 |
Total Capacity Range | 8 TB | 8 - 32 TB | 16 - 80 TB |
Ethernet Ports (RJ45) | 1 x 10GbE, 2 x 1GbE | 1 x 10GbE, 2 x 1GbE | 1 x 10GbE, 2 x 1GbE |
CPU / RAM | 1.5 GHz Dual Core / 8GB ECC | 1.5 GHz Dual Core / 8GB ECC | 2.0 GHz Quad-Core / 8GB ECC |
Snapshot | Yes (Microsoft VSS) | Yes (Microsoft VSS) | Yes |
Cloud Integration | Dropbox, Azure, OneDrive | Dropbox, Azure, OneDrive | AWS S3, Dropbox, Azure, OneDrive |
TAA Compliant | Yes | Yes | Yes |
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