10 Best NAS Enclosures With Four Bays in 2026 for Secure, Expandable Storage

A four-bay NAS can give your home, studio, or small office room to grow while keeping backups, media, and shared files in one organized location. The challenge is choosing between a complete diskless NAS, a USB-attached enclosure, and a DIY chassis.

We compared 10 four-bay options across expansion, connectivity, drive support, cooling, software, and ease of setup so you can match the hardware to your storage plans and technical comfort level.

Best 10 Nas Enclosure with Four Bays Picks for 2026

Practical DAS Pick – CENMATE 4-Bay USB 3.0 Enclosure

If you need a nas enclosure with four bays mainly for local, direct-attached storage, the CENMATE provides four tool-free bays for 2.5-inch and 3.5-inch SATA HDDs or SSDs. It connects over USB 3.0 and supports up to 80TB total, but it is a DAS enclosure rather than a networked NAS and does not provide RAID.

Best For: Individuals or small businesses wanting expandable desktop storage with USB-A/C connectivity.

Pros:

• Supports four 2.5-inch or 3.5-inch SATA drives, up to 80TB total
• Tool-free, hot-swappable drive access
• USB 3.0 transfer rates up to 5Gbps with included USB-A/C cable
• Aluminum housing, cooling fan, and 12V power adapter

Cons:

• No RAID or NAS networking functionality
• Fan noise is rated around 40–50 decibels
• USB 3.0 is slower than newer 10Gbps enclosures

The CENMATE is a straightforward four-bay storage expansion option for a computer, especially if you value simple installation and broad Windows, Mac, and Linux compatibility. Choose a true NAS instead if you need remote access or network file sharing.

Home and Office NAS Pick – Synology DS423 4-Bay NAS

For shoppers specifically seeking a nas enclosure with four bays, the diskless Synology DS423 adds the networked features a basic drive enclosure lacks. It is designed for private-cloud access, file sharing, backups, snapshots, and video surveillance, making it suited to home and business environments.

Best For: Families, teams, and small businesses needing centralized files, backups, remote access, and surveillance tools.

Pros:

• Four-bay NAS platform for centralized file storage and sharing
• Supports backups, snapshots, versioned files, and multiple destinations
• Private-cloud access with team folders and permission controls
• Surveillance tools support up to 30 IP cameras, with licenses purchased separately

Cons:

• Diskless configuration requires separate drives
• Additional camera licenses are needed for surveillance expansion
• Software features may be more than needed for simple USB storage

The DS423 is the more complete choice when your priority is managed network storage rather than merely adding drives to one computer. Its two-year warranty and ongoing software updates also suit users who want a supported NAS platform.

High-Speed DAS Pick – SABRENT 4-Bay USB-C Enclosure

The SABRENT DS-SC4B is a strong alternative for buyers comparing a nas enclosure with four bays but actually needing fast direct-attached storage. Its four 3.5-inch SATA bays connect through USB-C at up to 10Gbps, with independent controllers, per-bay activity lights, and trayless hot-swapping.

Best For: Creators and power users who want fast, individually accessible drives attached to a Windows, macOS, or Linux computer.

Pros:

• Four independent drive connections over USB-C 10Gbps
• Trayless, tool-free hot-swap design with per-bay switches
• Active cooling with a 92mm fan and aluminum-and-metal construction
• Supports up to 80TB using four 20TB drives

Cons:

• It is DAS/JBOD, not a hardware RAID or networked NAS
• Drives are not included
• Its 9-pound weight makes it less portable than smaller enclosures

With faster USB-C bandwidth and independent bay connections, the SABRENT is well suited to large local transfers and multi-drive workflows. It is not the right fit if you expect built-in RAID management or remote network access.

Performance NAS Pick – UGREEN DXP4800 Plus 4-Bay NAS

The UGREEN DXP4800 Plus is a full-featured nas enclosure with four bays for users who want centralized storage, RAID options, and high-speed networking. It supports up to 144TB with compatible drives and adds 10GbE, 2.5GbE, Docker, virtual machines, private-cloud access, and photo management features.

Best For: Creators, small teams, and technically inclined households needing fast network storage and expandable applications.

Pros:

• Up to 144TB advertised capacity with compatible drives
• Includes 10GbE and 2.5GbE networking plus 10Gbps USB ports
• Supports RAID options, automatic backups, remote access, Docker, and virtual machines
• 8GB DDR5 RAM, 128GB SSD, and 4K HDMI support

Cons:

• Hard drives are not included
• Actual speeds depend on the network, computer, drives, and file sizes
• Wired Ethernet is required; Wi-Fi is not supported

The DXP4800 Plus offers considerably more performance and flexibility than a simple four-bay USB enclosure. It is best justified when you will use its faster networking, RAID, collaboration, or application features; basic storage users may not need that extra capability.

Best DAS Expansion – QNAP TR-004 4-Bay USB RAID Enclosure

The QNAP TR-004 is a practical choice when you need a nas enclosure with four bays but prefer direct-attached storage rather than a networked operating system. It connects over USB Type-C to Windows, macOS, or Linux computers and supports four 3.5-inch SATA drives.

Best For: Users who want external storage, NAS backup, or added capacity for a QNAP NAS with hardware RAID.

Pros:

• Supports RAID 0, 1, 5, JBOD, and individual-disk configurations.
• Works with Windows, macOS, and Linux through USB Type-C.
• Lockable drive bays and a metal enclosure add practical durability.
• Includes both USB Type-C to Type-A connectivity and mounting screws.

Cons:

• Diskless design requires separate drives.
• It is a DAS, so it does not provide the full functionality of a standalone NAS.
• QNAP NAS compatibility has specific model and QTS-version limitations.

The TR-004 is best viewed as a flexible four-drive USB enclosure with hardware RAID. Check compatibility carefully if you plan to connect it to an existing QNAP NAS, especially because its storage pool cannot be combined with the NAS pool and NAS applications cannot be installed on it.

Best Beginner NAS – UGREEN NAS DH4300 Plus 4-Bay

The UGREEN NAS DH4300 Plus is a full networked nas enclosure with four bays for home users, families, and remote workers. It is designed for private cloud storage, device-wide backups, media access, and photo organization, with storage disks purchased separately.

Best For: Beginners and home users who want remote file access, automatic phone backups, and a private alternative to recurring cloud storage fees.

Pros:

• Includes 8GB LPDDR4X RAM, a 2.5GbE network port, and 4K HDMI output.
• Supports automatic photo and video backups with AI-powered album organization.
• Works across Windows, macOS, Android, iOS, web browsers, and smart TVs.
• Supports Docker for additional applications.

Cons:

• Storage disks are not included.
• It supports Docker but not virtual machines.
• Its advanced photo and remote-access features may be more than basic file-storage users need.

With its beginner-focused setup, broad device support, and 2.5GbE networking, the DH4300 Plus is a capable four-bay NAS for a connected household. It is particularly appealing if automatic photo management and private remote access matter more than running virtual machines.

Best DIY Build – 4+1 Bay Mini-ITX NAS Case

This DIY case is a flexible nas enclosure with four 2.5- or 3.5-inch front bays plus one internal 2.5-inch bay. It is intended for builders who want to select their own Mini-ITX motherboard, power supply, processor, storage, and operating system.

Best For: DIY NAS builders who need expansion flexibility, a PCIe slot, and support for either a Flex or 1U power supply.

Pros:

• Supports four front 2.5- or 3.5-inch drive trays plus one internal 2.5-inch bay.
• Compatible with Mini-ITX motherboards measuring 6.7 by 6.7 inches.
• Accepts a single-slot, full-height PCIe expansion card.
• Includes two front USB 3.0 ports and a replaceable 80mm fan.

Cons:

• It is an empty case, so all computer components and drives must be supplied separately.
• Power-supply dimensions are limited to supported Flex or 1U formats.
• A DIY build requires component selection and installation.

This enclosure makes sense when off-the-shelf NAS hardware does not offer enough customization. Its Mini-ITX and PCIe support allow a tailored build, but buyers should verify motherboard, power-supply, expansion-card, and cooling requirements before ordering.

Best All-in-One Pick – Yxk Zero1 Pro 4-Bay NAS

The Yxk Zero1 Pro is a practical nas enclosure with four bays for families and home-office users who want a ready-to-configure private cloud. Its Intel N100 processor, 8GB of RAM, dual 2.5GbE ports, and 4K HDMI output support backups, file sharing, and home media uses, while the diskless design lets you choose your own drives.

Best For: Families, home offices, and beginners who want guided setup with flexible storage and media features.

Pros:

• Four SATA bays support up to four 32TB drives with RAID 0, 1, or 5.
• Dual 2.5GbE ports and 4K HDMI add useful networking and media flexibility.
• 8GB RAM, Docker support, and compatibility with alternative NAS operating systems suit more advanced projects.
• Mobile setup, remote access, and AI-assisted photo organization support everyday family backups.

Cons:

• Drives are not included, so the total setup cost depends on separately purchased storage.
• Some advanced software, operating-system, and playback compatibility depends on the chosen apps and hardware.

Choose the Zero1 Pro if you want a four-bay NAS that balances approachable setup with room for homelab experimentation. Its capacity, networking, and expansion options make it especially versatile for a growing home storage system.

Best DIY Enclosure – K3 Mini ITX 4-Bay NAS Case

The K3 is a bare chassis rather than a complete NAS, making it a useful nas enclosure with four bays for builders who want to choose their own Mini-ITX hardware. Its hot-swap trays, Flex PSU compatibility, steel construction, and rear 12cm fan provide a foundation for a TrueNAS, OpenMediaVault, or other DIY storage build.

Best For: DIY users assembling a compact private cloud, media server, or software-router system around Mini-ITX components.

Pros:

• Four tool-free bays accept 2.5-inch or 3.5-inch drives.
• Supports 6.7-by-6.7-inch Mini-ITX motherboards and Flex compact power supplies.
• 12cm rear fan and side ventilation help cool drives and internal components.
• Front USB 2.0 ports, drive indicators, mounting hardware, and cable-management space simplify building.

Cons:

• Motherboard, CPU, power supply, and other core components are not included.
• It provides only USB 2.0 connectivity and one included fan.
• Setup requires hardware selection and assembly rather than a guided NAS installation.

The K3 makes sense when customization matters more than convenience. It can keep a four-drive DIY system compact, but buyers should budget for the complete computer components and be comfortable configuring the NAS software themselves.

Best Quiet Media NAS – TERRAMASTER F4-425 4-Bay NAS

The TERRAMASTER F4-425 is a quiet nas enclosure with four bays aimed at home media and multi-user storage. Its Intel quad-core processor, 4GB of RAM, 2.5GbE networking, hardware-level 4K H.265 decoding, and support for Plex, Emby, and Jellyfin make it a strong fit for households managing shared files and video libraries.

Best For: Home media servers and families needing quiet operation, mobile backups, and flexible drive redundancy.

Pros:

• Intel x86 quad-core processing and 4GB RAM support multitasking and 4K transcoding.
• 2.5GbE enables faster file transfers and concurrent access for multiple users.
• Tool-free push-lock trays and reported 21dB(A) operation suit convenient, quiet setups.
• TRAID and TRAID+ arrays, cloud synchronization, and mobile backups add useful data-management options.

Cons:

• It is diskless, so compatible hard drives must be purchased separately.
• Its enclosure uses plastic rather than metal construction.
• Media playback and transcoding results can vary with the software and content used.

For a quiet living-room or bedroom setup, the F4-425 offers a well-rounded mix of storage management, media support, and straightforward mobile control. It is a particularly sensible choice for users prioritizing streaming features and low operating noise.

How We Picked the Best Nas Enclosure with Four Bays

We focused on products that provide four primary drive bays, while also including one model with an additional internal 2.5-inch bay and several DIY enclosures for builders who want maximum control. Our comparisons consider whether each unit is a complete NAS or a direct-attached storage enclosure, the supported drive sizes, hot-swap access, cooling, networking, RAID capability, operating system, and likely upgrade path.

We also separated convenience features from core storage hardware. A diskless NAS may include a processor, memory, networking, and management software, while a USB or DIY enclosure may require a host computer, operating system, power supply, or separate RAID solution.

Quick Comparison

Type	Best For	Main Advantage	Trade-Off
Complete NAS	Home users, families, and small teams	Remote access, apps, and centralized management	Usually costs more and may limit hardware flexibility
USB DAS enclosure	Desktop storage and local backups	Simple connection and broad host compatibility	Depends on a computer for advanced NAS functions
DIY NAS case	Experienced builders	Custom components, operating system, and upgrades	Requires assembly and compatibility planning

Key Buying Factors for a Nas Enclosure with Four Bays

NAS, DAS, or DIY Design

Choose a complete NAS if you want browser-based administration, user accounts, remote access, snapshots, media applications, or surveillance tools. A DAS is better when you primarily need additional local storage for one computer. DIY cases are suitable when you already know which motherboard, processor, operating system, and power supply you want to use.

Drive Compatibility and RAID

Check whether the enclosure accepts both 2.5-inch and 3.5-inch SATA drives, and verify any capacity or drive-validation limits. Four bays support common layouts such as RAID 5 for a balance of capacity and redundancy, RAID 6 for greater protection, or separate volumes for different workloads. RAID is not a substitute for an independent backup.

Networking and Connectivity

Gigabit Ethernet is adequate for general documents and backups, while 2.5GbE or faster networking is more useful for large media libraries, multiple users, and workstation transfers. USB-C DAS models can offer high local throughput, but actual speeds depend on the host port, drives, cable, and filesystem.

Cooling, Noise, and Expansion

Look for an accessible fan, sensible airflow, tool-free trays, and hot-swap support if you expect frequent drive changes. Also consider memory expandability, M.2 slots, PCIe options, HDMI output, and software support before committing to a long-term storage platform.

Who Should Buy Which Nas Enclosure with Four Bays?

Choose Synology if polished software, backup workflows, photo management, and straightforward family or business sharing matter most. Choose UGREEN, TerraMaster, or Yxk if you want a complete NAS with stronger hardware or faster networking for media and multitasking.

Choose QNAP, SABRENT, or CENMATE for direct-attached storage, drive migration, and local desktop backups without building a full network server. Choose the DIY cases if you are comfortable selecting components and installing your preferred NAS operating system. For any Nas Enclosure with Four Bays, budget for reliable drives and a separate backup destination before filling every bay.