10 Best NAS Enclosures With Four Bays for Flexible Storage in 2026

A four-bay enclosure gives you room to build a more capable storage system without immediately moving to enterprise-grade hardware. The products in this roundup range from complete NAS appliances with networking and apps to USB DAS units and DIY chassis.

Choose based on how you access your files, whether you need RAID or simply expanded capacity, and which drive types, network speeds, and management features fit your setup.

Best 10 Nas Enclosure with Four Bays Picks for 2026

Best High-Speed NAS – UGREEN DXP4800 GT

The UGREEN DXP4800 GT is a powerful nas enclosure with four bays for creators, office teams, and advanced home users. Its Ryzen processor, expandable memory, dual 10GbE ports, and NVMe support are suited to demanding transfers, media work, backups, and self-hosted applications.

Best For: Creators and small teams needing fast network editing, large storage capacity, and flexible server features.

Pros:

• Ryzen R2514 processor with 8GB DDR4 RAM, expandable to 64GB
• Dual 10GbE networking supports very fast transfers and link aggregation
• Supports Docker, virtual machines, surveillance, SD-card backup, and media apps
• Four SATA bays plus M.2 NVMe expansion provide substantial capacity flexibility

Cons:

• Diskless design requires separate drive purchases
• Its advanced features may be more than basic file-storage users need

This is the most performance-oriented option in the group. Choose it when fast networking, direct media workflows, and expandable applications matter more than keeping the setup simple.

Best NVMe Enclosure – TERRAMASTER D4 SSD NVMe

The TERRAMASTER D4 SSD NVMe is a compact nas enclosure with four bays designed for high-speed direct-attached storage rather than a standalone NAS operating system. It accepts four M.2 NVMe 2280 SSDs and connects over USB or Thunderbolt-compatible ports for demanding desktop workflows.

Best For: Mac, Windows, and Linux users who want compact, extremely fast external NVMe storage.

Pros:

• 40Gbps interface with reported speeds up to 3,224MB/s using four SSDs
• Four tool-free, hot-swappable M.2 NVMe 2280 slots
• Active cooling with temperature sensors and quiet standby operation
• Includes mobile backup and scheduled Windows backup software support

Cons:

• Does not include SSDs
• No built-in RAID; soft RAID requires third-party tools
• It is direct-attached storage, not a full network NAS

This enclosure is a strong fit for speed-focused users who already have a host computer. It is less suitable if you need built-in NAS applications, network sharing without a computer, or hardware RAID.

Best Home NAS – Asustor Drivestor 4 Gen 2

The Asustor Drivestor 4 Gen 2 is a practical nas enclosure with four bays for home users and small offices. It combines a quad-core processor, 2.5GbE networking, RAID support, private-cloud access, automated backups, and 4K Plex streaming in a relatively straightforward package.

Best For: Families and small offices building a private cloud for backups, file access, and media streaming.

Pros:

• Four bays support RAID 0/1/5/6/10 configurations
• 2.5GbE improves transfers over standard Gigabit networking
• Supports remote access, automated backups, synchronization, and 4K Plex streaming
• Btrfs snapshots and WORM support add protection against deletion and ransomware

Cons:

• Only 1GB of DDR4 RAM
• Diskless design requires separate hard drives
• Performance is aimed more at home and small-office use than demanding production workloads

The Drivestor 4 Gen 2 offers a balanced feature set for everyday NAS use. It is a sensible choice when backup, private-cloud convenience, RAID flexibility, and media serving are priorities.

Best DAS RAID Enclosure – QNAP TR-004

The QNAP TR-004 is a straightforward nas enclosure with four bays that works as USB Type-C direct-attached storage. Its hardware RAID modes, lockable drive bays, and support for Windows, macOS, and Linux make it useful for expanding a computer or backing up a compatible QNAP NAS.

Best For: Users who want simple, hardware-managed multi-drive storage connected directly to a computer or QNAP NAS.

Pros:

• Hardware RAID supports RAID 0, 1, 5, JBOD, and individual disks
• Accepts four 3.5-inch SATA drives and includes a USB Type-C to Type-A cable
• Lockable drive bays and a metal enclosure suit backup and business use
• Can expand compatible QNAP NAS storage or operate as external computer storage

Cons:

• USB 3.0 connectivity is slower than newer 10GbE or 40Gbps options
• It is a DAS, not a standalone NAS with installable NAS applications
• Compatibility and storage-pool limitations apply when connecting to QNAP NAS models

The TR-004 is best when hardware RAID and simple USB connectivity matter more than network features. Confirm compatibility before using it with a QNAP NAS, especially if you need integrated storage pools or NAS applications.

Versatile 4-Bay Expansion – WAVLINK 4-Bay Enclosure

If you need a nas enclosure with four bays for flexible local storage, the WAVLINK combines four SATA bays with fast USB-C connectivity. It supports both 3.5-inch and 2.5-inch SATA drives, although 2.5-inch drives require separate mounting brackets.

Best For: Users who want a high-speed desktop enclosure with drive flexibility, cooling, and HDMI display output.

Pros:

• Four SATA 6Gbps bays support 3.5-inch HDDs and SSDs, with up to 128TB of stated capacity.
• USB 3.2 Type-C supports data transfers up to 10Gbps.
• Temperature-controlled dual fans and an aluminum shell help manage heat.
• Independent bay power switches and HDMI output add convenience.

Cons:

• It is an enclosure and does not include storage drives.
• 2.5-inch drives need separate 2.5-to-3.5-inch mounting brackets.
• HDMI output requires a compatible host USB-C video connection and USB-C-to-C cable.

The WAVLINK is a strong choice when you want more than basic DAS storage. Its mixed drive support, active cooling, and display connectivity make it suitable for expanding a workstation, but check your host’s USB-C video capabilities before relying on HDMI.

Beginner-Friendly Home Server – Yxk Zero1 Pro 4-Bay NAS

For shoppers seeking a true nas enclosure with four bays, the Yxk Zero1 Pro adds network storage features beyond a basic USB enclosure. Its guided app setup, Intel N100 processor, RAID support, and remote-access tools make it suited to shared household storage and personal server projects.

Best For: Families, home-office users, and enthusiasts building a private cloud, media server, or expandable homelab.

Pros:

• Four SATA bays support up to four 32TB drives and RAID 0, 1, or 5.
• Intel N100 processor, 8GB DDR4 RAM, and two M.2 NVMe slots provide a capable foundation.
• Dual 2.5GbE ports and 4K HDMI support fast networking and compatible media setups.
• Docker and compatible third-party operating system support offer enthusiast flexibility.

Cons:

• The NAS is diskless, so HDDs or SSDs must be purchased separately.
• RAID, Docker, operating system, and media features may require additional configuration or compatibility checks.
• Maximum raw capacity figures are before formatting and RAID overhead.

The Zero1 Pro is the most complete option here for users who specifically want networked storage rather than a direct-attached enclosure. Its approachable setup suits beginners, while NVMe expansion, Docker, and third-party OS support leave room for more advanced projects.

Simple Direct-Attached Storage – SABRENT 4-Bay USB-C Enclosure

The SABRENT is a straightforward nas enclosure with four bays for users who want direct-attached access to multiple SATA drives. Its trayless design, per-bay switches, and 10Gbps USB-C connection make it convenient for a computer-based storage setup, but it is JBOD rather than a hardware RAID system.

Best For: Windows, macOS, or Linux users who need independent access to up to four 3.5-inch drives.

Pros:

• Four independent drive connections support up to four 3.5-inch SATA HDDs or SSDs.
• Trayless hot-swap design, per-bay switches, and activity LEDs simplify drive management.
• USB-C 10Gbps connectivity is backward compatible with USB 3.0 and USB 2.0.
• Aluminum-and-metal construction and a 92mm fan support extended operation.

Cons:

• It is JBOD, not hardware RAID, so redundancy must be handled by the host system or software.
• The four bays ship empty and support only 3.5-inch drives as specified.
• Its external enclosure is relatively heavy at 9 pounds.

Choose the SABRENT when independent drive access matters more than built-in RAID or NAS software. It offers a practical, cross-platform way to connect four drives over one USB-C link, with useful hot-swap-oriented controls and active cooling.

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

For builders looking for a nas enclosure with four bays, this KCMconmey case offers four 2.5/3.5-inch drive trays plus an additional internal 2.5-inch bay. Its Mini-ITX support, Flex or 1U PSU compatibility, and single-slot PCIe clearance make it a flexible foundation for a custom storage server.

Best For: DIY NAS builders who want expansion options and a compact Mini-ITX chassis.

Pros:

• Supports four 2.5/3.5-inch drives plus one internal 2.5-inch drive.
• Accepts Mini-ITX motherboards and Flex or compatible 1U power supplies.
• Provides clearance for one single-slot, full-height PCIe expansion card.
• Includes two front USB 3.0 ports and a replaceable 80mm fan.

Cons:

• Requires a separate motherboard, power supply, and other system components.
• Limited to Mini-ITX motherboards and a single-slot expansion card.
• The product is a case rather than a complete NAS system.

With its added internal bay and expansion-card support, this enclosure is better suited to hands-on builders than plug-and-play storage shoppers. Check component dimensions carefully before assembly.

Best RAID-Capable DAS – Aluminum 4-Bay RAID Enclosure

This CENMATE enclosure is an external alternative for shoppers comparing a nas enclosure with four bays but needing direct-attached storage instead of a networked system. It holds 2.5/3.5-inch SATA drives, supports up to 80TB, and offers eight RAID modes through USB 3.0 or eSATA.

Best For: Users who need multi-drive external storage with configurable RAID modes.

Pros:

• Supports four 2.5/3.5-inch SATA HDDs or SSDs, up to 80TB total.
• Offers RAID 0/1/3/5/10, Clone, Large, and Normal modes.
• Provides USB A/C 3.0 and eSATA connectivity with up to 5Gbps transfer rates.
• Aluminum construction and built-in fans help with cooling.

Cons:

• This is DAS, not NAS, so it does not provide network-attached storage functionality.
• Hot-swapping is not supported.
• Fan noise is rated around 40–50 decibels, and eSATA multi-bay access requires RAID-capable host support.

The broad RAID selection makes this a capable desktop storage enclosure, but its setup requires care: changing RAID modes can cause data loss, and the unit must return to Normal before selecting another mode.

Best Simple Plug-and-Play DAS – Tool-Free 4-Bay USB Enclosure

If you want a straightforward nas enclosure with four bays but do not need RAID or networking, this CENMATE model focuses on direct USB storage. It accepts 2.5/3.5-inch SATA drives, supports hot-swapping and tool-free installation, and connects to Windows, Mac, and Linux systems.

Best For: Users who want convenient, expandable USB storage without RAID configuration.

Pros:

• Holds four 2.5/3.5-inch HDDs or SSDs with up to 80TB total capacity.
• Supports hot-swapping and tool-free hard-drive installation.
• USB A/C 3.0 connectivity supports transfer rates up to 5Gbps with UASP.
• Includes a 12V power adapter, aluminum housing, and cooling fan.

Cons:

• This is a DAS enclosure with no RAID or NAS functionality.
• Fan noise is around 40–50 decibels.
• Drive performance depends on the connected computer and USB interface.

This is the simplest option of the three for adding several independent drives to a desktop or laptop. Choose it when easy access and hot-swapping matter more than RAID protection or network sharing.

How We Picked the Best Nas Enclosure with Four Bays

We evaluated these four-bay storage products by separating complete NAS systems from direct-attached storage and barebones enclosures. Key considerations included drive compatibility, connection speed, RAID or JBOD support, cooling, expandability, setup requirements, and suitability for backups, media streaming, office files, or creative workloads.

Because a Nas Enclosure with Four Bays can mean very different things across product categories, we also considered whether each model includes an operating system, networking hardware, memory, or storage-management software. Diskless products require separate drives and may need additional configuration.

Quick Comparison

Type	Best for	What to check
Complete NAS	Remote access, private cloud, backups, media servers	CPU, RAM, network ports, software support
USB DAS or RAID enclosure	Desktop storage, local backups, simple expansion	RAID modes, host connection, operating-system support
NVMe enclosure	Fast scratch storage and compact creator workflows	SSD thermals, USB bandwidth, sustained performance
DIY chassis	Custom NAS builds and upgrades	Motherboard, power supply, backplane, cooling

Key Buying Factors for a Nas Enclosure with Four Bays

NAS, DAS, or DIY

A true NAS connects to your network and can provide user accounts, remote access, automated backups, and media services independently of a host computer. A DAS connects directly by USB or another local interface, making it simpler and often less expensive, but it generally depends on the connected computer. DIY cases provide flexibility but require you to source compatible components and install the software.

Drive and RAID Compatibility

Check whether the enclosure accepts 3.5-inch hard drives, 2.5-inch SATA drives, M.2 NVMe SSDs, or a combination. RAID 1 protects against a single drive failure, while RAID 5 provides usable capacity with redundancy across four drives. JBOD and single-disk modes maximize flexibility but do not automatically protect data. RAID is not a substitute for an independent backup.

Speed, Networking, and Cooling

For networked storage, 2.5GbE or 10GbE can make a substantial difference when your computer, switch, and cabling support the same standard. USB 10Gbps and 40Gbps ratings describe the connection ceiling, not guaranteed sustained drive speed. Hard drives, NVMe SSDs, and RAID configurations can perform very differently, so look for adequate fans, temperature monitoring, and ventilation.

Software and Setup

App ecosystems vary widely. Consider support for scheduled computer backups, snapshots, Docker or third-party applications, user permissions, cloud synchronization, and Plex or other media servers. Beginner-friendly software may be more valuable than peak specifications if several people will manage the storage.

Who Should Buy Which Nas Enclosure with Four Bays?

Choose a complete NAS if you want private cloud features, remote file access, automated backups, or a media server. A USB DAS is usually the better fit for a workstation that needs local capacity or straightforward backup storage. NVMe-focused models suit creators who prioritize compact, low-latency scratch space. A DIY four-bay case is best for technically confident buyers who want control over the motherboard, operating system, networking, and future upgrades.

Before ordering, confirm drive height and interface requirements, included cables, power needs, supported RAID modes, and whether drives are included. Plan a separate backup for irreplaceable files, regardless of which enclosure you select.