10 Best Nas Devices 2026 in the United States

The Synology DS1522+ is a solid choice for anyone needing a mid-sized NAS device with good flexibility. It comes with 5 bays, allowing you to install multiple hard drives, and the included bundle offers 20TB total storage using five 4TB Seagate IronWolf drives, which are designed for reliable NAS use. Powered by an AMD Ryzen R1600 processor and 8GB of RAM, this NAS can handle more demanding tasks and support several users accessing files at the same time without slowing down. It supports RAID configurations, which means you can protect your data by spreading it across drives in ways that keep it safe if one drive fails.

Connectivity is strong with four Gigabit Ethernet ports (RJ-45 1GbE), providing fast and stable network access, which is important if multiple devices are connected or if you’re moving large files. Synology’s software enhances the experience by offering private cloud features, letting you sync and access your data remotely with ease, while also including built-in security measures to keep your files safe. The device’s metal build gives it a sturdy feel, though it weighs around 15.7 pounds, which is normal for this type of equipment.

One minor point is the 5400 RPM hard drives, which are quieter and cooler but not as fast as 7200 RPM models, so transfer speeds might be slightly slower for very heavy workloads. This NAS is best suited for small to medium businesses or tech-savvy home users who want a dependable, expandable storage solution with strong data protection and remote access features.

The BUFFALO TeraStation 5820DN is a strong choice for businesses needing reliable, large-scale data storage. It comes with 8 bays and 4 pre-installed 20TB hard drives, offering a total of 80TB raw space. With RAID 5 configured by default, you get around 54TB usable storage that balances speed and protection, and you can switch to RAID 6 for even better redundancy or RAID 0 for maximum capacity without protection. The device includes built-in 256-bit encryption and two-factor authentication, making it a secure option for sensitive data. It supports snapshot backups that help you recover files quickly without interrupting work, which is handy against ransomware threats.

Connectivity is excellent with a native 10GbE port, meaning fast data transfers without needing extra hardware upgrades. The NAS is compatible with Windows, Mac, and Linux, and integrates with popular cloud services like Dropbox and Microsoft Azure for added backup flexibility. It runs on a stable, business-focused system designed to handle heavy workloads smoothly. The device is relatively large and weighs nearly 24 pounds, so it’s best suited for a fixed office setup rather than portable use.

This NAS is ideal for medium to large businesses needing secure, high-capacity storage with fast network access and robust backup options. It includes a solid 3-year warranty with optional extensions and 24/7 support, providing added peace of mind.

The BUFFALO TeraStation 3420DN is a solid choice for small to medium businesses needing reliable network-attached storage with good data protection. It offers 16TB total capacity spread over four 4TB NAS-grade hard drives, using RAID 5 by default to provide about 12TB of usable storage with fault tolerance. You can also switch to RAID 6 for extra redundancy or RAID 0 for maximum space but less protection. Its 4-bay design is flexible enough for typical office storage needs. The device supports iSCSI, making it suitable for expanding server storage, and includes native 2.5GbE Ethernet for faster network transfers without needing cable upgrades. Security features like 256-bit drive encryption and a closed system add peace of mind for sensitive data. It also integrates with popular cloud services like Amazon S3 and Dropbox, which can be handy for hybrid backup solutions.

Setup is straightforward, with RAID 1 pre-configured for quick protection out of the box. The TeraStation is backed by a 3-year warranty including hard drive coverage, and US-based support is available around the clock. Although it may not be the most power-efficient model compared to newer NAS units, given its weight and older design, it’s built in Japan for quality assurance. This NAS is best suited for businesses needing dependable, secure storage with easy management rather than advanced home media features.