Choosing the right NAS can simplify backups, centralize files, and make team collaboration far easier. For small businesses, the best setup balances storage, security, ease of use, and room to grow.
Below, we focus on business-friendly options with practical features for file sharing, media access, and data protection—plus a few alternatives if you need a different bay count or budget.
Best 10 4 Bay Nas Devices for Small Business Picks for 2026
Best for Security
BUFFALO TeraStation 3430DN 4-Bay 8TB NAS
- Includes 4 NAS-grade drives and preconfigured RAID 5
- Strong security with encryption, 2FA, and activity detection
- 3-year warranty and US-based live support included
Best For: Small businesses that want secure, ready-to-run NAS storage with bundled drives.
Best for Media & Backups
Synology DS425+ 4-Bay Private Cloud NAS
- 2.5GbE speeds with up to 278 MB/s throughput
- RAID, snapshots, and automated backups for data protection
- Access controls plus surveillance support for up to 30 cameras
Best For: Small teams needing a flexible private cloud for file sharing, backups, and media.
Best for Easy Setup
BUFFALO TeraStation Essentials 2025 4-Bay NAS
- Drives included with RAID pre-configured
- 2.5GbE for faster shared-file transfers
- 3-year warranty with drive coverage
Best For: Small businesses that want a ready-to-use NAS with simple setup and dependable backup protection.
Best for Secure Team Sharing
- Private-cloud file sharing with permissions
- Ransomware-resistant backups and snapshots
- Optional surveillance support for up to 30 IP cameras
Best For: Small teams that need centralized file sharing, backups, and optional camera monitoring.
Best Value RAID NAS
BUFFALO LinkStation 220 4TB 2-Bay NAS
- Drives included with 4TB total capacity
- RAID 1 support for simple backup redundancy
- Subscription-free shared storage for home or office
Best For: Small offices and home teams that want an inexpensive, easy-to-manage NAS with built-in redundancy.
Best for Speed
Asustor Lockerstor 4 Gen2+ 4-Bay NAS
- Dual 5GbE ports for faster small-business file transfers
- Four M.2 NVMe slots for cache or tiered storage
- Intel quad-core CPU with Plex and 4K HDMI support
Best For: Small teams and creators needing fast, flexible network storage with strong upgrade potential.
Best for Secure Small-Office Backup
BUFFALO TeraStation 3230DN 2-Bay 4TB NAS
- Preconfigured RAID with NAS-grade drives included
- Business security tools: encryption, 2FA, and activity detection
- 24/7 uptime design plus 3-year warranty and US phone support
Best For: Small offices that want secure, preconfigured network storage with included drives and straightforward deployment.
Best Value 2-Bay NAS
BUFFALO LinkStation 220 8TB NAS
- 8TB included with RAID 1 backup support
- Subscription-free shared storage and personal cloud
- Windows/macOS compatibility with included backup tools
Best For: Small teams and home offices that want affordable, secure shared storage with simple backup.
Best Value Entry NAS
BUFFALO LinkStation 210 4TB 1-Bay NAS
- Includes 4TB HDD for ready-to-use storage
- Simple shared network access for small offices
- Subscription-free personal cloud and backup tools
Best For: Solo owners and small offices that need low-cost shared storage with easy setup.
Best for Simple Setup
BUFFALO LinkStation 710 4TB 1-Bay NAS
- Ready to use with a 4TB hard drive included
- Subscription-free personal cloud and backup features
- Windows/macOS support with 24/7 US-based help
Best For: Small teams that want easy shared storage and backup without monthly fees.
Best for Security – BUFFALO TeraStation 3430DN 4-Bay 8TB NAS
BUFFALO TeraStation 3430DN 4-Bay 8TB (4x2TB) Desktop Small-Med Business NAS w/Hard Drives Included
Check Price On AmazonIf you want one of the more security-focused 4 bay nas devices for small business, the BUFFALO TeraStation 3430DN is built for always-on office storage with drives included, preconfigured RAID, and support for up to about 40 users.
Best For: Small teams that need a ready-to-deploy NAS with strong security features, bundled drives, and dependable 24/7 uptime.
Pros:
- Includes 4 pre-tested NAS-grade drives and ships preconfigured in RAID 5
- Strong security options like 256-bit drive encryption, 2FA, and login/activity detection
- Cloud sync support with Dropbox, OneDrive, and Amazon S3 for hybrid backup
- 3-year warranty plus US-based live phone support and data recovery service
Cons:
- RAID 5 reduces usable capacity versus raw 8TB total
- More business-focused than a simple plug-and-play home NAS
- Not the cheapest option in the 4-bay category
This is a smart pick if security and uptime matter more than bargain pricing. Among 4 bay nas devices for small business, it stands out for arriving ready to deploy with layered protection and support built around office use.
Best for Media & Backups – Synology DS425+ 4-Bay Private Cloud NAS
Synology DS425+ Private Cloud Media Server - Stream, Back Up & Share Files (4-Bay Diskless NAS)
Check Price On AmazonIf you want one of the more versatile 4 bay nas devices for small business, the Synology DS425+ is built to handle shared files, media streaming, backups, and even light surveillance from a compact desktop chassis. Its 2.5GbE networking and DSM software make it a practical fit for teams that need fast access and straightforward admin controls.
Best For: Small teams that need a reliable private cloud for file sharing, backups, and media access with room for growth.
Pros:
- Fast 2.5GbE networking with up to 278 MB/s throughput for office file sharing
- 4-bay design supports RAID redundancy, snapshots, and automated backups
- Granular access controls and audit logs help manage team permissions
- Can double as a surveillance hub with support for up to 30 IP cameras
Cons:
- Diskless model means you must buy drives separately
- Not the cheapest option if you only need basic file storage
For buyers comparing 4 bay nas devices for small business, the DS425+ stands out as a flexible all-in-one platform rather than just a storage box. It makes the most sense when you want easy-to-manage backups, secure sharing, and room to add apps like media and surveillance later.
Best for Easy Setup – BUFFALO TeraStation Essentials 2025 4-Bay NAS
BUFFALO TeraStation Essentials 2025 4-Bay Value Desktop NAS 8TB (4x2TB) with Hard Drives Included
Check Price On AmazonIf you want one of the more straightforward 4 bay nas devices for small business use, this BUFFALO TeraStation Essentials model is built to get you running quickly. It ships with drives installed, comes pre-configured in RAID 5, and adds 2.5GbE networking for faster transfers without a cable upgrade.
Best For: Small teams that want a ready-to-use desktop NAS with built-in protection, simple deployment, and room to expand storage strategy later.
Pros:
- Hard drives included and RAID pre-configured for quick setup
- 2.5GbE port improves transfer speeds for shared office files
- 256-bit drive encryption, replication, and cloud sync options add protection
- 3-year warranty includes drive coverage plus US-based support
Cons:
- Ships with 4 TB usable capacity in the default RAID 5 setup
- Fewer bays than larger NAS units for future growth
- Feature set is practical, but not aimed at advanced enterprise users
This is a strong fit if you want a dependable, low-fuss storage appliance among 4 bay nas devices for small business needs. It focuses more on setup ease, backup safety, and day-one usability than on raw expansion, which makes it especially appealing for offices that just need secure shared storage.
Best for Secure Team Sharing – Synology DS423 4-Bay NAS
If you want one of the more practical 4 bay nas devices for small business, the Synology DS423 is built around secure file sharing, backup, and easy expansion into surveillance. It’s a solid fit for teams that need a private cloud for documents and media without relying on Dropbox or SharePoint.
Best For: Small teams that need centralized file sharing, backups, and optional camera-based monitoring in one NAS.
Pros:
- Private-cloud file sharing with team folders and permissions
- Ransomware-resistant backups with snapshots and versioning
- Supports video surveillance use with up to 30 IP cameras
- 2-year warranty plus Synology DSM software features
Cons:
- Diskless, so you’ll need to buy drives separately
- Camera licenses are sold separately for surveillance use
- May be more NAS than needed for very basic file-only setups
For small businesses that care most about secure sharing and reliable backup, the DS423 hits a strong balance of versatility and protection. It stands out among 4 bay nas devices for small business because it covers everyday storage, collaboration, and surveillance without pushing you into a more complex enterprise system.
Best Value RAID NAS – BUFFALO LinkStation 220 4TB 2-Bay NAS
If you want a simple, affordable storage box for backups and file sharing, the BUFFALO LinkStation 220 is a practical entry point for 4 bay nas devices for small business-style needs where centralized storage matters more than advanced expansion. It ships with drives included, supports RAID 1 for redundancy, and keeps setup straightforward for shared access across Windows and macOS systems.
Best For: Small teams or home offices that need low-maintenance shared storage, basic backup, and built-in drive redundancy without paying for subscription cloud storage.
Pros:
- Includes 4TB total capacity with two installed drives
- RAID 1 support adds automatic backup protection
- Subscription-free personal cloud for remote media and file access
- Closed-system design and SSL encryption help reduce risk
Cons:
- Only 2 bays, so it is not a true 4-bay expansion platform
- Performance is modest compared with newer NAS models
- macOS support is limited on the newest versions
For buyers comparing 4 bay nas devices for small business use, this LinkStation 220 stands out more for value and simplicity than raw capacity. It is a solid fit if you need dependable shared storage now and can live with a basic two-bay setup rather than a larger, more scalable enclosure.
Best for Speed – Asustor Lockerstor 4 Gen2+ 4-Bay NAS
If you want one of the faster 4 bay nas devices for small business, the Asustor Lockerstor 4 Gen2+ stands out with dual 5GbE networking, an Intel Celeron N5105 processor, and room for both HDDs and NVMe cache. It’s built to handle shared files, media libraries, and remote access without feeling overmatched.
Best For: Small teams, creators, and office users who want fast file transfers, flexible hybrid storage, and Plex-ready performance in a diskless 4-bay NAS.
Pros:
- Dual 5GbE ports deliver faster transfers than standard Gigabit NAS models
- Four M.2 NVMe slots add strong cache and responsiveness options
- Intel quad-core CPU handles multitasking, sharing, and streaming well
- Supports RAID, 4K HDMI output, and expandable DDR4 memory
Cons:
- Diskless model means drives must be purchased separately
- Higher-end networking may be more than basic office setups need
- NVMe-heavy configurations can raise total build cost
This is a strong fit if you care more about throughput and expandability than bare-bones simplicity. For 4 bay nas devices for small business, it’s especially appealing when shared storage, creative workloads, and future upgrades all matter.
Best for Secure Small-Office Backup – BUFFALO TeraStation 3230DN 2-Bay 4TB NAS
BUFFALO TeraStation 3230DN 2-Bay 4TB (2x2TB) Desktop Small-Med Business NAS w/Hard Drives Included
Check Price On AmazonIf you need one of the more business-ready 4 bay nas devices for small business workflows but want a simpler, lower-footprint setup, the BUFFALO TeraStation 3230DN is worth a look. It ships with NAS-grade drives installed, a preconfigured RAID setup, and security features designed for always-on office use, making it a practical fit for teams that need dependable shared storage and backup.
Best For: Small offices that want secure, preconfigured network storage with included drives and straightforward deployment.
Pros:
- Includes 2 pre-tested NAS drives and ships ready for RAID-based setup.
- Strong business security features like 256-bit encryption, 2FA, and login/file activity detection.
- Designed for 24/7 uptime with Buffalo support and a 3-year warranty.
- Cloud sync options with Dropbox, OneDrive, and Amazon S3 add flexibility.
Cons:
- Only 2 bays, so it offers less expansion than true 4-bay systems.
- Usable capacity drops to 2 TB in the included RAID 1 configuration.
For buyers comparing 4 bay nas devices for small business, this model stands out less for raw bay count and more for secure, ready-to-run deployment. It is a better match when reliability, support, and data protection matter more than maximum expandability.
Best Value 2-Bay NAS – BUFFALO LinkStation 220 8TB NAS
If you’re comparing 4 bay nas devices for small business use, the BUFFALO LinkStation 220 is a simpler value pick that still covers shared storage, automatic backup, and secure file access. It’s a practical fit for teams that want centralized network storage without paying for extra bays or subscription fees.
Best For: Small teams, home offices, and buyers who want an affordable NAS with RAID protection and basic backup features.
Pros:
- 8TB included with 2 bays and RAID 1 support for automatic data protection
- Subscription-free personal cloud and shared network storage
- Windows and macOS compatibility with included backup tools
- Closed-system design and SSL encryption for added security
Cons:
- Only 2 bays, so it’s less scalable than true 4 bay nas devices for small business
- Slower and less feature-rich than Buffalo’s LS 700 line
- macOS support is limited to version 15 and earlier
Overall, this is a budget-friendly NAS for teams that prioritize straightforward backup and secure file sharing over expansion. If your shortlist of 4 bay nas devices for small business includes lower-cost alternatives, this model is worth a look when simplicity and included drives matter more than growth headroom.
Best Value Entry NAS – BUFFALO LinkStation 210 4TB 1-Bay NAS
If you’re comparing 4 bay nas devices for small business, this LinkStation 210 is the budget-friendly starting point rather than a high-capacity expansion box. It gives you centralized storage, simple network sharing, and included 4TB HDD storage in a compact 1-bay design, making it a practical pick when your priority is basic backup and file access over multi-drive RAID flexibility.
Best For: Solo owners, home offices, and very small teams that want an inexpensive network storage device for shared files and backups.
Pros:
- Includes 4TB of storage with the drive already installed
- Simple shared network access for Windows and older macOS systems
- Subscription-free personal cloud features for media and file access
- US-based 24/7 support can help with setup
Cons:
- Only one drive bay, so it lacks true multi-drive redundancy and expandability
- Not a fit for buyers who specifically need the flexibility of 4 bay nas devices for small business
- macOS support is limited to earlier versions for the included utilities
Overall, the LinkStation 210 works best as a low-cost, easy shared-storage solution for simple backup workflows. If your shortlist of 4 bay nas devices for small business is really about affordability and basic network storage, this model is worth a look—but it won’t replace a true multi-bay business NAS.
Best for Simple Setup – BUFFALO LinkStation 710 4TB 1-Bay NAS
If you want a straightforward storage box rather than a complex rack setup, this LinkStation 710 is a practical entry point for 4 bay nas devices for small business buyers who mainly need shared file access, automatic backups, and a safer alternative to keeping files on individual PCs.
Best For: Small teams that want a simple, subscription-free network storage device for backups, file sharing, and basic private cloud access.
Pros:
- Includes a 4TB hard drive, so it’s ready to deploy out of the box.
- Supports Windows and macOS 26, plus guided 24/7 US-based support.
- Subscription-free personal cloud features help avoid monthly storage fees.
- Closed system design and SSL encryption add a security-focused layer.
Cons:
- It’s a 1-bay NAS, so it lacks the expansion and redundancy of true 4-bay units.
- 4TB may be limiting for growing business archives or media libraries.
- More basic than higher-end business NAS models for advanced workloads.
For small offices that mainly need dependable shared storage and backups, this Buffalo model is easy to understand and maintain, but it’s not the right match if you specifically need true 4 bay nas devices for small business with room for multi-drive expansion and RAID flexibility.
How We Picked the Best 4 Bay Nas Devices for Small Business
We prioritized NAS systems that make sense for small teams: dependable file storage, straightforward administration, RAID support, and enough performance for everyday backups and shared access. For 4 Bay Nas Devices for Small Business, expandability matters, so we also looked at hardware that can scale with your storage needs over time.
Quick Comparison
Among these picks, the four-bay Synology and BUFFALO TeraStation models are the most natural fits for business-first use, while the Asustor Lockerstor 4 Gen2+ stands out for higher performance and more flexible hardware. The two-bay and one-bay BUFFALO models are better viewed as lower-cost or smaller-scale alternatives when your storage needs are lighter.
Key Buying Factors for 4 Bay Nas Devices for Small Business
Capacity and RAID Flexibility
A four-bay enclosure gives you more options than a smaller NAS, including a better balance between usable capacity and fault tolerance. Look for RAID support that matches your risk tolerance and growth plans.
Performance and Network Speed
If your team regularly moves large files, backs up multiple PCs, or streams shared media, faster processors and multi-gig networking can make a noticeable difference. This is especially important when several users access the NAS at once.
Data Protection and Access Control
Business NAS features should include user permissions, shared folders, backups, snapshots or versioning where available, and remote access options you can manage securely.
Ease of Setup and Management
Small businesses often need something reliable without a steep learning curve. A clear dashboard, mobile access, and simple drive management can save time for teams without dedicated IT staff.
Who Should Buy Which 4 Bay Nas Devices for Small Business?
If your priority is straightforward business storage with included drives, a BUFFALO TeraStation model is often the most plug-and-play choice. If you want more flexibility and a strong app ecosystem, Synology is usually the better long-term platform. If performance is the main goal, especially for heavier multitasking or media workflows, the Asustor Lockerstor 4 Gen2+ is the strongest hardware-focused option in this group.
For smaller offices or tighter budgets, the 2-bay and 1-bay BUFFALO LinkStation models can still work well for basic backup and home-office style file sharing, but they leave less room for expansion. Choose based on how many users you support today and how much growth you expect over the next few years.