10 Best Nas Servers 2025 in the United States

The Synology DiskStation DS1621+ is a robust NAS server designed with business needs in mind. With a powerful Ryzen V1500B Quad-Core 2.2GHz CPU and 16GB of DDR4 RAM, it offers excellent performance for a range of tasks, such as backup, file storage, email servers, and more. The inclusion of 1TB M.2 SSD for fast storage and 12TB HDD for high capacity ensures ample and versatile storage solutions.

This NAS server supports multiple connectivity options with 4 RJ-45 1GbE LAN ports (with Link Aggregation/Failover support), USB 3.2 ports, and eSATA ports, allowing for flexible network integration and expansion. Additionally, it offers robust software features like iSCSI Target Protocol, Cache Acceleration, Virtual Machine Manager, and various backup solutions, enhancing its utility in a business environment. Synology's DSM operating system provides a user-friendly and secure experience with AES 256-bit encryption and two-factor authentication.

One downside is that while the hardware is powerful, installation is required as the hard drives and memory upgrades are not pre-installed. With a respectable customer rating of 4.3 out of 5 stars, it's evident that users generally appreciate its capabilities and performance. This NAS server is best suited for small to medium-sized businesses looking for a versatile, reliable, and feature-rich storage solution.

The Buffalo TeraStation 5420DN is a solid choice for small to medium businesses needing reliable network storage. It offers a large 40TB total capacity with 4 drive bays, using pre-installed NAS-grade hard drives designed for durability. While it ships set to RAID 1, which provides good data protection by mirroring drives for safety, you can switch to RAID 6 for extra redundancy or RAID 0 if you prioritize maximum storage space.

One standout feature is the built-in 10GbE port, allowing fast data transfers over the network without needing new cables, which is great if you frequently move large files. Security is taken seriously with 256-bit encryption, two-factor authentication, and snapshot backups to quickly recover data if needed, including protection against ransomware. It also supports syncing with popular cloud services like Dropbox and Microsoft Azure, giving extra backup options.

The drives spin at 5600 RPM, which is a bit slower than typical 7200 RPM drives, possibly affecting speed in very demanding tasks. The product comes with a reassuring 3-year warranty and 24/7 US-based support, plus it’s made in Japan and TAA compliant, ensuring quality and compliance for government or enterprise use. If you want a dependable, secure NAS with large storage and fast network access for business backups and file sharing, this TeraStation model fits well.

The BUFFALO TeraStation 5820DN is a solid choice for businesses needing a large and reliable network storage solution. It comes with 8 bays, each preloaded with 20TB NAS-grade hard drives, giving you a massive raw capacity of 160TB. Configured in RAID 6 out of the box, it offers about 120TB of usable space with good data protection, which is ideal for critical business data. The device supports RAID configurations, allowing flexibility depending on your needs for speed or redundancy.

Its hardware is designed for stability and security, featuring a closed system with 256-bit encryption and two-factor authentication to protect sensitive files. The built-in snapshot feature helps with quick backups and recovery, which is useful in preventing data loss from accidental deletion or ransomware attacks. Another standout is the native 10GbE Ethernet port that supports very fast file transfers without needing additional hardware upgrades, beneficial for environments with heavy data traffic.

In terms of compatibility, it works well across Windows, Mac, and Linux systems, making it versatile in mixed-OS offices. Cloud integration with services like Dropbox and Amazon S3 enables hybrid backup strategies for extra data safety. The unit is fairly large and weighs about 31.5 pounds, and while power consumption and noise levels aren’t explicitly detailed, business NAS devices like this typically balance performance with reasonable energy use and quiet operation. The 5600 RPM hard drives are optimized for NAS use but might be slower than higher RPM drives for some intensive tasks. If you need a high-capacity, secure, and business-focused NAS with strong data protection and fast network connectivity, the TeraStation 5820DN is a dependable option best suited for medium to large businesses looking for a robust desktop NAS without having to separately buy drives.