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 QNAP TVS-h874X-i9-64G-US is a powerful 8-bay NAS designed for users who need fast, reliable storage with plenty of room for expansion. It comes diskless, allowing you to choose your preferred hard drives, supporting large storage setups. The 12th Gen Intel Core i9 processor combined with 64GB of DDR4 RAM offers strong performance, making it well suited for heavy multitasking, virtualization, and demanding file operations. Dual M.2 NVMe SSD slots help speed up access by enabling SSD caching.

Connectivity is a standout feature here, with dual 10GbE and four 2.5GbE ports, plus multiple USB 3.2 Gen 2 connections, which means transfers and backups can happen very quickly compared to typical NAS devices. This is ideal for users working with large media files or extensive backup tasks. The system supports RAID configurations, which protect your data in case of drive failures and add flexibility depending on your needs. It also includes business-friendly features like cloud backup, virtual machine support, and ransomware protection through snapshots for data safety.

The device features 4K video playback and transcoding with HDMI output, making it a good choice for media professionals or enthusiasts who want to stream content directly. While it's a bit on the heavier side (17 pounds) and likely consumes more power and produces more noise than simpler NAS models, this trade-off comes with the benefit of high performance and expandability. This NAS is well suited for advanced home users, small businesses, or creative professionals who demand speed, capacity, and robust data protection.

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.