Best QNAP 4-Bay NAS Devices: 15 Spec-Based Picks
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Finding the best QNAP 4-Bay network attached storages requires looking at published specs rather than marketing claims. We compared 15 models to help you match hardware to your workflow. The QNAP 4-Bay USB-C Hardware RAID Enclosure leads as the best overall pick because its direct-attached design adds bulk storage without network complexity. This guide breaks down dimensions, connectivity, and form factors so you can decide if a desktop unit or rackmount expansion fits your space and speed needs.
Quick picks
The best fit for you
- You want the most compact desktop model available QNAP 4-Bay 2.5GbE NAS Enclosure The TS-433 measures just 3.39 by 2.62 inches, making it the smallest footprint on the list.
- You need high-speed networking for large files QNAP 4-Bay 10GbE SFP+ NAS The TS-431X3 includes both 10GbE and 2.5GbE ports for maximum transfer versatility.
- You require a pre-configured plug-and-play solution QNAP 4-Bay USB-C Direct Attached Storage The TR-004 comes with 12TB of drives installed for immediate local storage use.
- You need dual 10GbE ports in a rack QNAP 4-Bay 10GbE Rackmount NAS The TS-432PXU provides dual 10GbE connectivity within a standard rackmount chassis.
Our 15 picks
QNAP 4-Bay USB-C Hardware RAID Enclosure
Best for: expanding QNAP NAS storage capacity
- Number of Bays
- 4-Bay (what this guide is about)
- Drive Bays
- 4-Bay
- Included Storage
- Diskless
- RAID Support
- RAID 0, 1, 5, JBOD
- Dimensions
- 8.62 × 6.31 × 6.63 inches
- Weight
- 4.08 pounds
The QNAP TR-004 is a 4-bay direct-attached storage device connecting via USB Type-C. It supports hardware RAID 0, 1, 5, and JBOD for data redundancy. This diskless unit expands your NAS capacity or serves as an external backup drive. It fits Windows, macOS, and Linux systems. You get lockable drive bays for security. It is a simple expansion tool without network features.
Pros
- Hardware RAID support for RAID 0, 1, 5, and JBOD
- USB Type-C connection for fast data transfer
- Lockable drive bays for physical security
- Compatible with Windows, macOS, and Linux
Cons
- Diskless design requires separate hard drive purchases
- No network connectivity or IP address
- Cannot install NAS applications or QTS
Good fit if
- You need extra storage for a QNAP NAS
- You want a simple backup solution
- You prefer hardware RAID management
Skip if
- You need a standalone network-attached storage device
- You want to run apps on the storage unit
- You require built-in hard drives
Verdict: QNAP TR-004 4-Bay USB-C DAS is a reliable expansion tool for QNAP users. It adds bulk storage without network complexity. It suits those who need more space for backups or file pools.
QNAP 4-Bay USB-C Direct Attached Storage
Best for: pre-configured local desktop and NAS expansion
- Number of Bays
- 4-Bay (what this guide is about)
- Drive Bays
- 4-Bay
- Included Storage
- 12TB
- RAID Support
- RAID 0, 1, 5, JBOD
This 4-bay direct attached storage unit comes pre-installed with four 4TB drives arranged in a 12TB RAID 5 configuration. It connects directly via a USB 3.2 Gen 1 Type-C port rather than a network connection, making it suitable for direct system backups or expanding existing storage. Internal bays support 3.5-inch or 2.5-inch SATA 3Gb/s drives. You will find it ideal if you need plug-and-play desktop expansion for Windows, macOS, or Linux.
Pros
- Includes 12TB total storage across four pre-installed 4TB drives
- Pre-configured out of the box in RAID 5
- Includes 3-year Seagate Rescue Data Recovery Services
- Lockable drive bays with USB 3.2 Gen 1 Type-C connectivity
Cons
- Direct-attached storage design with no integrated Ethernet port
- Drive interface limited to SATA 3Gb/s speeds
Good fit if
- You want pre-configured 12TB storage ready to use right away.
- You need direct-attached expansion for a PC, Mac, or NAS via USB.
Skip if
- You need a standalone network-attached unit with Ethernet connectivity.
- You require SATA 6Gb/s drive interface speeds.
Verdict: QNAP 4-Bay Direct Attached Storage with 12TB provides pre-configured plug-and-play capacity for direct backups or expanding an existing setup. Its USB connection delivers immediate local storage without network configuration requirements.
QNAP TR-004U 4 Bay Rackmount NAS
Best for: expanding QNAP NAS storage capacity
- Number of Bays
- 4-Bay (what this guide is about)
- Drive Bays
- 4 Bay
- Network Connectivity
- USB 3.0 Type-C
- Form Factor
- Rackmount
- Dimensions
- 21.3 × 16.5 × 7.87 inches
- Weight
- 4.41 pounds
The QNAP TR-004U is a 4-bay rackmount enclosure designed to expand storage for your QNAP NAS. It features a USB 3.0 Type-C port for faster data transfers. You can configure RAID groups using dip switches for hardware control or via software on a connected NAS. The unit supports up to four SATA drives and includes lockable trays for security. It serves as a reliable hardware-based RAID storage solution or direct-attached storage device.
Pros
- USB 3.0 Type-C port for faster data transfer
- Supports up to four SATA drives
- Lockable hard drive trays for security
- Dip switch for hardware RAID configuration
Cons
- Limited to SATA drive interfaces
- Requires a separate QNAP NAS for software management
- No built-in network ports for standalone use
Good fit if
- You need to add 4-bay storage to an existing QNAP NAS
- You prefer hardware-based RAID configuration via dip switches
- You require lockable drive trays for security
Skip if
- You need a standalone NAS with built-in network ports
- You require 10GbE or higher network connectivity
- You are looking for a desktop form factor
Verdict: QNAP TR-004U 4 Bay Rackmount Expansion is a secure expansion unit for users who already have a QNAP NAS and need additional SATA storage space in a rackmount form factor.
QNAP 4 Bay 1U Rackmount SATA JBOD
Best for: expanding storage for existing QNAP NAS
- Number of Bays
- 4-Bay (what this guide is about)
- Drive Bays
- 4 Bay
- Included Storage
- Diskless
- Form Factor
- Rackmount
- Hardware Interface
- SATA
- Dimensions
- 21.3 × 16.3 × 7.05 inches
This is a 4-bay rackmount SATA expansion unit. It connects to your existing QNAP NAS, Windows, or Linux systems via a PCIe SATA card and SFF-8088 cable. The enclosure holds four 3.5-inch SATA drives. It does not include drives. This device adds storage capacity without requiring a full NAS system. It fits standard 1U rack spaces. You get direct SATA connectivity for your existing infrastructure.
Pros
- Four 3.5-inch SATA drive bays
- 1U rackmount form factor
- Includes PCIe SATA card and SFF-8088 cable
- Compatible with QNAP NAS and Windows/Linux
Cons
- Diskless; requires you to supply drives
- No built-in network ports for standalone use
- Large physical footprint for a 1U unit
Good fit if
- You need extra SATA storage for an existing QNAP NAS
- You are building a Windows or Linux server
- You require a 1U rackmount expansion unit
Skip if
- You need a standalone NAS with network ports
- You want a pre-configured unit with drives included
- You need a tower form factor
Verdict: QNAP TL-R400S 4 Bay Rackmount JBOD is a dedicated storage expansion unit for systems that already have processing power. It suits users who need to add four SATA drives to a rackmount server or QNAP NAS. It is not a complete NAS solution.
QNAP TS-431K 4-Bay NAS
Best for: Basic home file storage
- Number of Bays
- 4-Bay (what this guide is about)
- Drive Bays
- 4 Bay
- Network Connectivity
- 2 x 1 GbE
- Processor
- Annapurna Labs AL-214
- RAM Capacity
- 1GB DDR3
- Included Storage
- Diskless
The QNAP TS-431K is a 4-bay home NAS featuring an Annapurna Labs AL-214 quad-core processor running at 1.7 GHz. It includes 1GB of DDR3 RAM and two 1GbE ports for network connectivity. The unit supports three USB 3.2 Gen 1 ports and four SATA 6Gb/s bays. This device suits users needing basic home storage with standard gigabit networking speeds.
Pros
- Annapurna Labs AL-214 quad-core 1.7 GHz processor
- Two 1 GbE ports for network connectivity
- Three USB 3.2 Gen 1 ports
- Four 3.5-inch SATA drive bays
Cons
- Only 1GB of DDR3 RAM limits multitasking
- 1GbE ports lack high-speed 10GbE options
- Sold diskless with no pre-installed drives
Good fit if
- You need a simple home NAS for basic file storage
- You prefer standard 1GbE network speeds
- You want a white desktop enclosure
Skip if
- You require 10GbE or faster network speeds
- You need more than 1GB of system RAM
- You want a rackmount form factor
Verdict: QNAP TS-431K 4-Bay Home NAS fits users who prioritize basic home storage over high-speed networking. It is a practical entry-level option for standard gigabit environments.
QNAP 4-Bay 10GbE SFP+ NAS
Best for: high-speed 10GbE SFP+ local network storage
- Number of Bays
- 4-Bay (what this guide is about)
- Drive Bays
- 4-Bay
- Network Connectivity
- 1x 10GbE, 1x 2.5GbE, 1x 1GbE
- Processor
- AnnapurnaLabs AL-314
- RAM Capacity
- 4GB DDR3L
- Included Storage
- Diskless
This 4-bay desktop unit gives you high-speed local networking through a dedicated 10GbE SFP+ port alongside 2.5GbE and 1GbE ports. It runs on a quad-core 1.7GHz AnnapurnaLabs processor paired with 4GB of DDR3L memory. You get four 3.5-inch SATA drive bays and three USB 3.2 Gen 1 ports for external storage. It suits you if you need multi-gigabit throughput across mixed network speeds.
Pros
- Dedicated 10GbE SFP+, 2.5GbE, and 1GbE network ports
- Four 3.5-inch SATA 6Gb/s drive bays
- AnnapurnaLabs AL-314 quad-core 1.7GHz processor
- Three USB 3.2 Gen 1 ports
Cons
- Uses DDR3L memory architecture
- Maximum memory expansion capped at 8GB
- Ships diskless without included storage drives
Good fit if
- You require 10GbE SFP+ connectivity for high-speed file transfers.
- You have mixed-speed local networks with 1GbE and 2.5GbE hardware.
- You want four 3.5-inch SATA bays to configure your own drives.
Skip if
- You need more than 8GB of system memory for heavier workloads.
- You want a system that includes pre-installed storage drives.
Verdict: QNAP 4-Bay 10GbE SFP+ NAS delivers versatile high-speed network connectivity with its built-in 10GbE and 2.5GbE ports. It offers a solid four-bay platform if your setup requires multi-gigabit transfer rates.
QNAP 4-Bay 2.5GbE NAS Enclosure
Best for: Home users needing 4-bay storage
- Number of Bays
- 4-Bay (what this guide is about)
- Drive Bays
- 4 BAYS
- Network Connectivity
- 1x 2.5Gigabit Ethernet Port
- Processor
- 2.0GHz 4-core Cortex-A55 ARM
- RAM Capacity
- 4GB built-in
- Included Storage
- No HDD
The QNAP TS-433 is a 4-bay desktop NAS powered by a 2.0GHz quad-core ARM Cortex-A55 processor and 4GB of built-in RAM. It features a single 2.5GbE port for network connectivity. This unit arrives without hard drives, allowing you to select your own storage capacity. It is designed for users who need reliable local storage with moderate processing power for home or small office use.
Pros
- Quad-core 2.0GHz ARM processor
- 4GB built-in RAM
- Single 2.5GbE Ethernet port
- Supports up to 80TB total capacity
Cons
- No hard drives included
- Only one network port
- Lower RAM compared to higher-end models
Good fit if
- You need a compact 4-bay NAS for home use
- You prefer to choose your own hard drives
- You want a reliable ARM-based system
Skip if
- You require 10GbE networking speeds
- You need more than 4GB of RAM
- You want a pre-configured storage solution
Verdict: QNAP TS-433 4-Bay Desktop NAS is a solid entry-level choice for users who prioritize storage capacity over high-speed networking. It fits those who want to build their own drive array without paying for pre-installed disks.
QNAP 4-Bay Desktop NAS with 8GB RAM
Best for: Users needing 8GB RAM and 2.5GbE speed
- Number of Bays
- 4-Bay (what this guide is about)
- Drive Bays
- 4-Bay
- Network Connectivity
- Dual 2.5GbE
- Processor
- Intel Pentium Gold G7400
- RAM Capacity
- 8GB DDR4
- M.2 NVMe Slots
- 2 slots
This QNAP 4-bay desktop NAS features an Intel Pentium Gold G7400 processor and 8GB of DDR4 RAM. It includes dual 2.5GbE ports for faster network transfers and two M.2 NVMe slots for SSD caching or storage pools. You get HDMI 4K output for media playback. This unit suits users needing strong processing power and high-speed local networking for desktop storage tasks.
Pros
- 8GB DDR4 RAM supports up to 64GB expansion
- Intel Pentium Gold G7400 2-core CPU
- Dual 2.5GbE network ports
- Two M.2 NVMe PCIe Gen3x2 slots
- HDMI 1.4b output for 4K media
Cons
- Only two-core processor compared to quad-core rivals
- No 10GbE network port included
- Limited to 2.5GbE speeds
Good fit if
- You need 8GB of RAM for virtualization
- You want fast 2.5GbE local transfers
- You plan to use NVMe SSDs for caching
Skip if
- You require 10GbE connectivity
- You need a rackmount form factor
- You want a multi-core CPU for heavy tasks
Verdict: QNAP TVS-h474-8G Desktop NAS provides robust processing and ample RAM for desktop users who prioritize speed over rackmount flexibility. It fits those needing 2.5GbE networking and NVMe support.
QNAP 4-Bay Ryzen Desktop NAS
Best for: Users needing strong CPU power for media
- Number of Bays
- 4-Bay (what this guide is about)
- Drive Bays
- 4-Bay
- Network Connectivity
- Dual 2.5GbE
- Processor
- AMD Ryzen V1500B
- RAM Capacity
- 8GB DDR4
- M.2 NVMe Slots
- 2 slots
The QNAP TS-473A is a 4-bay desktop NAS built for speed. It features a quad-core AMD Ryzen V1500B processor and 8GB of DDR4 RAM. Dual 2.5GbE ports help accelerate file sharing. Two M.2 NVMe slots allow for cache acceleration or SSD storage pools. You get multiple USB 3.2 ports for fast transfers. This model suits users who need strong processing power for media or team workflows.
Pros
- Quad-core AMD Ryzen V1500B processor runs at 2.2 GHz
- 8GB DDR4 RAM expands up to 64GB
- Dual 2.5GbE network ports for faster sharing
- Two M.2 NVMe SSD slots for performance
- Multiple USB 3.2 Gen 2 ports with 10Gb/s speeds
Cons
- Lacks 10GbE connectivity found in other list models
- No mention of a display panel for local status
- Desktop form factor limits rackmount integration
Good fit if
- You need fast local storage for large media files
- You want to accelerate performance with NVMe SSDs
- You require multiple USB 3.2 connections for peripherals
Skip if
- You require 10GbE network speeds
- You need a rackmount chassis for server rooms
- You prefer a simpler home NAS with lower specs
Verdict: QNAP TS-473A 4-Bay Desktop NAS offers strong CPU power and flexible storage options for users prioritizing processing speed over network bandwidth.
QNAP 4-Bay Desktop NAS with Dual 2.5GbE
Best for: home users needing dual 2.5GbE and NVMe
- Number of Bays
- 4-Bay (what this guide is about)
- Drive Bays
- 4 Bay
- Network Connectivity
- Dual 2.5GbE
- Processor
- Intel Quad-core
- RAM Capacity
- 8GB
- M.2 NVMe Slots
- Dual M.2 PCIe Gen3x2 NVMe
The QNAP TS-453E-8G-US is a 4-bay desktop NAS featuring an Intel quad-core processor and 8GB of RAM. It includes dual 2.5GbE ports for faster network transfers and two M.2 NVMe slots for SSD caching or storage. You will appreciate the four USB 3.2 Gen 2 ports for connecting external drives. This unit suits users needing balanced performance for home or small office file storage.
Pros
- Intel quad-core CPU with 8GB RAM
- Dual 2.5GbE network ports
- Two M.2 NVMe SSD slots
- Four USB 3.2 Gen 2 ports
Cons
- Lacks 10GbE connectivity found in higher-end models
- Uses slower 2.5GbE instead of 10GbE
- No mention of rackmount capability
Good fit if
- You need dual 2.5GbE ports for faster local transfers
- You want M.2 NVMe slots for SSD caching
- You prefer a desktop form factor for home use
Skip if
- You require 10GbE network speeds
- You need a rackmount chassis
- You want a USB Type-C connection
Verdict: QNAP TS-453E 4-Bay Desktop NAS offers solid specs for home users who need dual 2.5GbE ports and NVMe support without the bulk of a rackmount unit.
QNAP 4-Bay 10GbE Rackmount NAS
Best for: Rackmount users needing dual 10GbE ports
- Number of Bays
- 4-Bay (what this guide is about)
- Drive Bays
- 4 Bay
- Network Connectivity
- Two 10GbE SFP+, Two 2.5 GbE RJ45
- Processor
- AnnapurnaLabs Alpine AL324 1.7GHz
- RAM Capacity
- 2GB UDIMM DDR4
- Form Factor
- Rackmount
The QNAP TS-432PXU is a 4-bay rackmount NAS designed for high-speed connectivity. It features two 10GbE SFP+ ports and two 2.5 GbE RJ45 ports for flexible networking. The AnnapurnaLabs Alpine AL324 quad-core processor runs at 1.7GHz. It includes 2GB of upgradable DDR4 RAM. This unit suits users needing robust rackmount integration with fast network options.
Pros
- Two 10GbE SFP+ network ports
- Two 2.5 GbE RJ45 ports
- AnnapurnaLabs Alpine AL324 quad-core processor
- Upgradable 2GB DDR4 RAM
Cons
- Only 2GB base RAM
- Single power supply option
- No PCIe expansion slots listed
Good fit if
- You need dual 10GbE connectivity
- You require a rackmount form factor
- You want a 4-bay NAS
Skip if
- You need more than 4 drive bays
- You prefer a desktop form factor
- You require more than 2GB RAM
Verdict: The QNAP TS-432PXU Rackmount NAS fits users who need dual 10GbE ports in a rackmount chassis. It offers solid processing power for small teams.
QNAP 4-Bay Rackmount NAS with 2.5GbE
Best for: Rackmount users needing dual 2.5GbE
- Number of Bays
- 4-Bay (what this guide is about)
- Drive Bays
- 4 Bay
- Network Connectivity
- Dual 2.5GbE
- Processor
- Intel Quad-core
- RAM Capacity
- 8GB RAM
- M.2 NVMe Slots
- Optional via PCIe
This is a 4-bay rackmount NAS designed for high-speed data access. It features an Intel quad-core CPU with 8GB of RAM. Dual 2.5GbE ports help accelerate file sharing. You get PCIe slots for expansion cards and fast USB 3.2 ports. This unit suits teams needing reliable storage in a rack. It supports backup for Google Workspace and Microsoft 365 accounts.
Pros
- Intel Quad-core CPU with 8GB RAM
- Dual 2.5GbE network ports
- PCIe Gen 3x2 expansion slots
- USB 3.2 Gen 2 ports
Cons
- Rackmount form factor limits desktop use
- No 10GbE ports for maximum speed
- No included hard drives
Good fit if
- You need a rackmount NAS
- You want dual 2.5GbE connectivity
- You require PCIe expansion options
Skip if
- You prefer a desktop form factor
- You need 10GbE networking
- You want a pre-configured drive setup
Verdict: QNAP TS-464U 4-Bay Rackmount NAS offers solid rackmount performance with dual 2.5GbE ports. It fits users who need expansion slots and reliable team storage in a server rack.
QNAP 4-Bay 1U Short Depth Rackmount NAS
Best for: 1U rackmount setups needing dual 2.5GbE
- Number of Bays
- 4-Bay (what this guide is about)
- Drive Bays
- 4-Bay
- Network Connectivity
- Dual 2.5GbE
- Processor
- Intel Quad-core
- RAM Capacity
- 8GB
- M.2 NVMe Slots
- 2 slots
This is a 4-bay rackmount NAS designed for 1U short-depth enclosures. It features an Intel quad-core CPU with 8GB RAM and dual 2.5GbE ports for fast networking. Two M.2 NVMe slots support cache or storage pools. It also includes HDMI output for 4K media playback. This unit suits users needing compact rack integration with solid processing power.
Pros
- Intel quad-core CPU up to 2.9 GHz
- 8GB built-in RAM
- Dual 2.5GbE network ports
- Two M.2 NVMe SSD slots
Cons
- HDMI 1.4b limits output to 4K at 30Hz
- 1U form factor restricts drive height options
- No mention of 10GbE connectivity
Good fit if
- You need a 1U short-depth rackmount solution
- You require dual 2.5GbE connectivity
- You want NVMe cache acceleration
Skip if
- You need 10GbE network speeds
- You require 4K at 60Hz video output
- You prefer desktop form factors
Verdict: QNAP TS-464eU 4-Bay 1U Rackmount NAS fits users who need compact rack space and dual 2.5GbE ports. It is ideal for teams needing NVMe acceleration in a 1U chassis.
QNAP 5+4 Bay Hybrid NAS with Dual 10GbE
Best for: hybrid drive setups needing 10GbE SFP+ networking
- Number of Bays
- 4-Bay (what this guide is about)
- Drive Bays
- 5+4 Bay
- Network Connectivity
- 2 x 10GbE SFP+, 2 x 2.5GbE
- Included Storage
- Diskless
This diskless network attached storage unit gives you five 3.5-inch and four 2.5-inch SATA bays for a hybrid drive configuration. It features two 10GbE SFP+ ports alongside two 2.5GbE network connections for high-bandwidth transfers. You also get three USB 3.2 Gen 1 ports for external connectivity, plus snapshot support and QuDedup backup tools. This setup fits you if you need mixed drive types and high-speed multi-gigabit networking.
Pros
- Dual 10GbE SFP+ and dual 2.5GbE network ports
- Five 3.5-inch and four 2.5-inch SATA bays
- Three USB 3.2 Gen 1 ports
- Built-in snapshot and QuDedup backup support
Cons
- Ships diskless without pre-installed storage drives
- 10GbE connectivity requires SFP+ connections rather than RJ45
- Four of the bays are restricted to 2.5-inch drives
Good fit if
- You need high-bandwidth 10GbE SFP+ and 2.5GbE networking.
- You plan to combine 3.5-inch hard drives with 2.5-inch drives.
- You require snapshot protection and source-side QuDedup backup.
Skip if
- You want pre-installed drives included out of the box.
- You need copper 10GBASE-T RJ45 ports instead of SFP+.
- You need all drive bays to accommodate 3.5-inch drives.
Verdict: QNAP 5+4 Bay Dual 10GbE NAS delivers hybrid drive capacity alongside fast SFP+ and 2.5GbE networking. It provides robust snapshot and backup capabilities for bandwidth-intensive data environments.
QNAP 4-Bay ARM Desktop NAS with 2.5GbE
Best for: home multimedia streaming and multi-device backups
- Number of Bays
- 4-Bay (what this guide is about)
- Drive Bays
- 4-Bay
- Network Connectivity
- 1 x 2.5GbE, 1 x 1GbE
- Processor
- ARM Cortex-A55
- RAM Capacity
- 4 GB DDR4
This 4-bay enclosure runs an ARM Cortex-A55 quad-core 2.0 GHz processor paired with 4 GB of DDR4 memory. For network connectivity, you get one 2.5GbE port alongside a standard 1GbE port. It supports Time Machine for Mac computers and NetBak Replicator for Windows devices. If you want a centralized unit to store personal media files and handle routine multi-platform computer backups across four drives, this unit matches your requirements.
Pros
- ARM Cortex-A55 quad-core 2.0 GHz processor
- 4 GB DDR4 RAM
- One 2.5GbE port and one 1GbE port
- Supports Time Machine and NetBak Replicator
Cons
- No 10GbE network ports
- No integrated M.2 NVMe SSD slots listed
Good fit if
- You want a 4-bay setup with 2.5GbE connectivity.
- You back up Windows PCs with NetBak Replicator or Macs with Time Machine.
- You need central storage for personal photos, music, and videos.
Skip if
- You require 10GbE network speeds.
- You need M.2 NVMe SSD slots for storage.
Verdict: QNAP 4-Bay 2.5GbE NAS provides four drive bays, 2.5GbE networking, and an ARM quad-core processor for centralized home backups and media storage.
Specifications side by side
| Spec | QNAP 4-Bay USB-C Hardware RAID Enclosure | QNAP 4-Bay USB-C Direct Attached Storage | QNAP TR-004U 4 Bay Rackmount NAS | QNAP 4 Bay 1U Rackmount SATA JBOD | QNAP TS-431K 4-Bay NAS | QNAP 4-Bay 10GbE SFP+ NAS | QNAP 4-Bay 2.5GbE NAS Enclosure | QNAP 4-Bay Desktop NAS with 8GB RAM | QNAP 4-Bay Ryzen Desktop NAS | QNAP 4-Bay Desktop NAS with Dual 2.5GbE | QNAP 4-Bay 10GbE Rackmount NAS | QNAP 4-Bay Rackmount NAS with 2.5GbE | QNAP 4-Bay 1U Short Depth Rackmount NAS | QNAP 5+4 Bay Hybrid NAS with Dual 10GbE | QNAP 4-Bay ARM Desktop NAS with 2.5GbE |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Drive Bays | 4-Bay | 4-Bay | 4 Bay | 4 Bay | 4 Bay | 4-Bay | 4 BAYS | 4-Bay | 4-Bay | 4 Bay | 4 Bay | 4 Bay | 4-Bay | 5+4 Bay | 4-Bay |
| Network Connectivity | not specified | not specified | USB 3.0 Type-C | not specified | 2 x 1 GbE | 1x 10GbE, 1x 2.5GbE, 1x 1GbE | 1x 2.5Gigabit Ethernet Port | Dual 2.5GbE | Dual 2.5GbE | Dual 2.5GbE | Two 10GbE SFP+, Two 2.5 GbE RJ45 | Dual 2.5GbE | Dual 2.5GbE | 2 x 10GbE SFP+, 2 x 2.5GbE | 1 x 2.5GbE, 1 x 1GbE |
| Processor | not specified | not specified | not specified | not specified | Annapurna Labs AL-214 | AnnapurnaLabs AL-314 | 2.0GHz 4-core Cortex-A55 ARM | Intel Pentium Gold G7400 | AMD Ryzen V1500B | Intel Quad-core | AnnapurnaLabs Alpine AL324 1.7GHz | Intel Quad-core | Intel Quad-core | not specified | ARM Cortex-A55 |
| RAM Capacity | not specified | not specified | not specified | not specified | 1GB DDR3 | 4GB DDR3L | 4GB built-in | 8GB DDR4 | 8GB DDR4 | 8GB | 2GB UDIMM DDR4 | 8GB RAM | 8GB | not specified | 4 GB DDR4 |
| M.2 NVMe Slots | not specified | not specified | not specified | not specified | not specified | not specified | not specified | 2 slots | 2 slots | Dual M.2 PCIe Gen3x2 NVMe | not specified | Optional via PCIe | 2 slots | not specified | not specified |
| Included Storage | Diskless | 12TB | not specified | Diskless | Diskless | Diskless | No HDD | Diskless | not specified | not specified | not specified | not specified | not specified | Diskless | not specified |
| RAID Support | RAID 0, 1, 5, JBOD | RAID 0, 1, 5, JBOD | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified |
| Form Factor | not specified | not specified | Rackmount | Rackmount | not specified | not specified | not specified | Desktop | Desktop | Desktop | Rackmount | Rackmount | Rackmount | not specified | not specified |
| Hardware Interface | not specified | not specified | not specified | SATA | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified |
| Number of Bays | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay |
| Processor Cores | not specified | not specified | not specified | not specified | not specified | not specified | Quad-Core | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified |
| Dimensions | 8.62 × 6.31 × 6.63 inches | not specified | 21.3 × 16.5 × 7.87 inches | 21.3 × 16.3 × 7.05 inches | 6.3 × 8.62 × 6.3 inches | 10 × 10 × 10 inches | 2.48 × 3.39 × 2.62 inches | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified |
| Weight | 4.08 pounds | not specified | 4.41 pounds | not specified | 4.4 pounds | 5.1 pounds | 4.56 pounds | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified |
| Size | 4 Bay | 4 Bay | 4 Bay | 4 Bay | NAS | 2.5GbE and 10GbE Ports | not specified | Intel Pentium | NAS Only | 4 Bay | 4 Bay | not specified | 4 Bay | not specified | 4 Bay |
| Color | Diskless | Black | Black | black | White | black | White | Black | Black | Black | Black | not specified | not specified | not specified | not specified |
| Model | TR-004-US | TR-004 | TR-004U | TL-R400S | TS-431K | TS-431X3 | TS-433-4G | not specified | not specified | not specified | TS-432PXU-RP-2G-AM-US | not specified | not specified | not specified | not specified |
To configure link aggregation for your NAS, evaluate port options among the best managed network switches.
How to Choose a QNAP 4-Bay Device
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Select Your Drive Interface
You need to choose between standard drive bays and dedicated flash slots. Traditional bays accommodate SATA hard drives or solid-state drives for high total capacity. In contrast, models like the QNAP 4-Bay M.2 NVMe SSD NAS rely exclusively on M.2 NVMe slots. This interface provides silent operation and rapid solid-state data throughput. If you prioritize raw volume, select SATA bays. Choose dedicated M.2 interfaces when you need all-flash performance.
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Evaluate the Processor Architecture
You must match processor architecture to your workload. Basic file storage and centralized home backups work well on energy-efficient ARM quad-core processors. If you run multiple demanding applications or business storage tasks, consider x86 processors such as an Intel Celeron or an AMD Ryzen chip. The QNAP 4-Bay AMD Ryzen Tower NAS uses Ryzen processing to handle routine business workloads smoothly. Check the processor specification to ensure your device handles your active software services.
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Check Memory Expansion Limits
You should check base RAM capacity and future expansion ceilings before choosing an enclosure. Several desktop and rack units include a fixed allocation of 8GB RAM, which suits standard file hosting and media sharing. If your workload requires heavier multitasking or larger snapshots, look for models with memory upgrade paths. The QNAP 4-Bay Rackmount NAS with Dual 10GbE SFP+ supports memory expansion up to 16GB. Confirm the memory limit matches your long-term operating needs.
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Review Dedicated Cache Slots
You can improve response times across standard hard drives by selecting an enclosure with dedicated caching slots. Units like the QNAP 4-Bay Quad-Core Desktop NAS provide dual M.2 NVMe slots alongside primary drive bays. This architecture allows you to accelerate routine data access without consuming primary SATA storage bays. If you only host cold archival backups, dedicated cache slots are unnecessary. Check the specification sheet for onboard M.2 slots if your setup demands responsive file access.
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Compare Direct and Network Attachment
You must decide whether you need networked access or direct local attachment. A direct-attached unit connects directly to a computer using a USB interface, eliminating network switches and IP configuration. The QNAP 4-Bay USB-C Direct Attached Storage delivers plug-and-play capacity for direct desktop backups or expanding an existing system. If multiple users or independent network services need simultaneous access across your office, select a standard NAS model with dedicated Ethernet ports instead of direct USB attachment.
Frequently asked questions
Which QNAP 4-Bay NAS is best for expanding existing storage?
The QNAP TR-004 serves as a reliable expansion tool for users needing more space without network complexity. It functions as a direct-attached storage solution that adds bulk capacity for backups or file pools. This model suits those who want to increase storage volume directly rather than through network configurations.
Does QNAP offer 4-Bay NAS devices with 10GbE connectivity?
Yes, the TS-431X3 features built-in 10GbE and 2.5GbE ports for high-speed local network storage. The TS-432PXU also provides dual 10GbE ports in a rackmount chassis. These models deliver versatile connectivity options for setups requiring multi-gigabit transfer rates and robust bandwidth for data-intensive tasks.
What is the smallest QNAP 4-Bay desktop NAS available?
The TS-433 measures just 3.39 by 2.62 inches, making it the most compact option on the list. It offers a solid entry-level choice for users prioritizing storage capacity over high-speed networking. This small footprint fits easily into home environments where space is limited.
Are there QNAP 4-Bay rackmount NAS options available?
Several rackmount models exist, including the TR-004U, TL-R400S, TS-432PXU, TS-464U, and TS-464eU. These units fit into standard server cabinets and provide dedicated expansion slots or SATA connectivity. They are ideal for teams needing reliable storage in a structured rack environment.
Which QNAP 4-Bay NAS includes 8GB of RAM?
The TVS-h474-8G provides robust processing and 8GB of RAM for desktop users. It supports 2.5GbE networking and NVMe acceleration for speed-focused workflows. This model fits users who prioritize processing power and ample memory over the flexibility of rackmount installations.
Can I get a QNAP 4-Bay NAS with dual 2.5GbE ports?
The TS-453E offers dual 2.5GbE ports alongside NVMe support for home users. The TS-464U also provides dual 2.5GbE ports in a rackmount form factor. These options ensure fast local network transfers for users needing consistent multi-gigabit speeds without requiring 10GbE infrastructure.