6 Best Alternatives to the QNAP 4-Bay 2.5GbE NAS Enclosure (2026)
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The QNAP TS-433-4G-US is a capable 4-bay tower NAS featuring a 2.0GHz quad-core ARM processor and 4GB of RAM. If you are searching for qnap ts 433 4g us storage NAS alternatives, you might want different network ports, more memory, or a distinct brand. This unit provides a solid foundation for local storage but lacks dual Ethernet ports or M.2 caching slots found in other models.
We selected these alternatives because their core specifications overlap with the original QNAP unit. The list includes other 4-bay enclosures with quad-core processors, ensuring they handle similar basic workloads. However, you may prefer a device with dual 2.5GbE ports for faster local transfers or higher RAM capacities for more demanding tasks. Some options also offer Intel or AMD processors instead of ARM architecture, which can impact performance for specific applications. These variations allow you to choose a machine that better fits your exact technical requirements without sacrificing the essential multi-drive storage capability.
Our top pick: QNAP 4-Bay 2.5GbE NAS Enclosure.
How each alternative compares
Asustor Lockerstor 4-Bay Quad-Core NAS
The Asustor Lockerstor offers dual 2.5GbE ports, providing more flexibility than the single 2.5Gigabit Ethernet port on the QNAP. It includes M.2 NVMe slots for caching, which the QNAP lacks. Both units feature quad-core processors and 4GB of RAM. The Asustor is larger and heavier, measuring 9.06 inches in length compared to the QNAP’s 2.48 inches. You should choose this Asustor model if you need redundant network connections or faster local caching speeds. It is a premium choice for users who prioritize network versatility and expansion options over a compact tower design.
Asustor AS3304T 4-Bay NAS
The Asustor AS3304T provides basic NAS functionality with 2GB of RAM, which is half the memory found in the QNAP TS-433-4G-US. It also features dual 2.5GbE ports for better network connectivity. This unit is designed for home media storage and file backup rather than high-performance processing. It is larger and heavier than the QNAP, weighing 4.85 pounds against the QNAP’s 4.56 pounds. You should pick this Asustor if you want a simpler setup with dual network ports but do not require the extra processing power or memory of the QNAP for heavy multitasking.
TerraMaster 4-Bay Multimedia NAS
The TerraMaster F4-212 is an entry-level option with 2GB of RAM, significantly less than the 4GB built into the QNAP. It uses a quad-core ARM processor similar to the QNAP but lacks advanced networking features. This model is focused on basic home media streaming and file storage. It is slightly heavier than the QNAP at 4.6 pounds. You should consider this TerraMaster if you are on a budget and need a simple 4-bay NAS for light duties. It gives up the higher RAM capacity and potentially better performance of the QNAP for a lower price point.
TERRAMASTER 4-Bay All-SSD NAS
The TerraMaster F4 SSD All-SSD NAS stands out with 8GB of RAM, double the capacity of the QNAP. It uses an Intel N95 processor, which differs from the ARM Cortex-A55 in the QNAP. This unit is designed for silent, high-speed NVMe storage workloads rather than traditional hard drives. It is much smaller and lighter, weighing only 1.32 pounds. You should choose this TerraMaster if you already own NVMe drives and need a compact, quiet server for specific high-speed tasks. It sacrifices the traditional 4-bay HDD configuration of the QNAP for specialized SSD performance.
TERRAMASTER 4-Bay Intel Quad-Core NAS
The TerraMaster F4-425 features an Intel quad-core processor and 4GB of RAM, matching the QNAP’s memory capacity. It is designed for quiet 4K home media streaming and multi-user file sharing. This unit is larger than the QNAP, with a length of 8.74 inches compared to the QNAP’s 2.48 inches. It weighs 4.19 pounds, slightly less than the QNAP. You should pick this TerraMaster if you prefer an Intel-based system for media playback. It offers similar storage capacity but in a different chassis form factor with a focus on silent operation for home environments.
Asustor Lockerstor 4-Bay 10GbE NAS
The Asustor AS6804T provides 16GB of RAM, which is four times the amount in the QNAP. It includes 10GbE networking ports, offering significantly higher bandwidth than the QNAP’s single 2.5GbE port. This unit uses an AMD Ryzen processor and supports M.2 NVMe drives. It is much larger, measuring 13 inches in length. You should choose this Asustor if you are a power user needing maximum RAM and high-speed networking for demanding workloads. It sacrifices the compact tower design of the QNAP for extensive expansion capabilities and superior processing power.
Quick picks
Our 7 picks
QNAP 4-Bay 2.5GbE NAS Enclosure
Best for: 2.5GbE multi-bay local network storage
- 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
- Processor Cores
- Quad-Core
This 4-bay tower enclosure gives you centralized storage powered by a quad-core 2.0GHz ARM Cortex-A55 processor and 4GB of built-in memory. A built-in 2.5GbE network port provides faster transfer speeds than standard gigabit connections across compatible home or office networks. It holds up to four drives without included hard disks, supporting up to 80TB total. It suits you if you need multi-bay capacity and multi-gigabit networking for everyday file backups.
Pros
- Built-in 2.5GbE Ethernet port
- Quad-core 2.0GHz Cortex-A55 ARM processor
- 4GB of built-in memory
- Four bays supporting up to 80TB total
Cons
- Hard drives are not included
- Includes only one Ethernet port
Good fit if
- You need a 4-bay enclosure supporting up to 80TB.
- You want 2.5GbE network transfer speeds.
- You have your own hard drives ready to install.
Skip if
- You need dual Ethernet ports for link aggregation.
- You prefer an enclosure that includes pre-installed drives.
Verdict: QNAP 4-Bay 2.5GbE ARM Tower NAS provides quad-core processing, 4GB of memory, and 2.5GbE speed in a 4-bay tower format. It is a capable diskless option for storing up to 80TB across your local network.
Asustor Lockerstor 4-Bay Quad-Core NAS
Best for: Users needing dual 2.5GbE ports and M.2 slots
- Drive Bays
- 4-Bay
- Network Connectivity
- 2x 2.5GbE
- Processor
- Quad-Core 2.0GHz
- RAM Capacity
- 4GB DDR4
- M.2 NVMe Slots
- 2 slots
- Included Storage
- Diskless
The Asustor Lockerstor 4 AS6604T is a 4-bay NAS featuring a Quad-Core 2.0GHz processor and 4GB DDR4 RAM. It includes two 2.5GbE network ports and two M.2 NVMe slots for cache or storage expansion. This unit suits users needing robust local storage with fast network connectivity and flexible SSD caching options for improved performance.
Pros
- Quad-Core 2.0GHz processor for steady performance
- Two built-in 2.5GbE network ports
- 4GB DDR4 RAM capacity
- Two M.2 NVMe slots for expansion
Cons
- 2.0GHz clock speed is lower than 2.3GHz or 2.4GHz alternatives
- 4GB RAM is less than 8GB options
- Diskless design requires separate drive purchase
Good fit if
- You need 2.5GbE networking speeds
- You want M.2 NVMe caching slots
- You prefer a 4-bay configuration
Skip if
- You require 8GB of RAM
- You need a higher clock speed than 2.0GHz
- You want pre-installed storage drives
Verdict: Asustor Lockerstor 4 2.5GbE NAS offers solid 4-bay storage with dual 2.5GbE ports and M.2 slots, making it ideal for users prioritizing network speed and caching flexibility over raw CPU power.
Asustor AS3304T 4-Bay NAS
Best for: Home media storage and basic file backup
- Drive Bays
- 4 Bay
- Network Connectivity
- 1 x 2.5GbE
- Processor
- Realtek RTD 1296
- RAM Capacity
- 2GB DDR4
- Included Storage
- Diskless
- Processor Cores
- Quad-Core
The Asustor Drivestor 4 Pro is a 4-bay NAS featuring a 1.4GHz quad-core Realtek CPU and 2GB of DDR4 RAM. It includes a single 2.5GbE port for faster network transfers compared to standard gigabit connections. The unit supports both 2.5-inch and 3.5-inch SATA drives, offering flexibility for SSD or HDD storage. It is designed for home and small office users who need reliable local storage with hardware-accelerated media transcoding capabilities.
Pros
- 1.4GHz quad-core Realtek CPU for steady performance
- 2.5GbE network port for increased bandwidth
- Supports 2.5-inch and 3.5-inch SATA drives
- Hardware decoding for 4K H.265 video playback
Cons
- Only 2GB of RAM limits heavy multitasking
- Single 2.5GbE port lacks link aggregation
- Lower CPU clock speed than competing models
Good fit if
- You need a budget-friendly 4-bay NAS
- You want hardware video transcoding support
- You are a home or small office user
Skip if
- You require multiple network ports for redundancy
- You need high-end CPU performance for virtualization
- You want to upgrade RAM beyond 2GB
Verdict: Asustor Drivestor 4 Pro 4-Bay NAS is a solid entry-level choice for users who prioritize basic NAS functionality and media playback over high-speed processing power. It suits those who do not need advanced networking features or extensive RAM expansion.
TerraMaster 4-Bay Multimedia NAS
Best for: entry-level multi-drive home media and file storage
- Drive Bays
- 4-Bay
- Processor
- ARM v8 quad-core 1.7GHz
- RAM Capacity
- 2GB
- Included Storage
- Diskless
- Dimensions
- 7.28 × 8.66 × 7.09 inches
- Weight
- 4.6 pounds
This four-bay network attached storage enclosure runs on an ARM v8 quad-core 1.7GHz processor paired with 2GB of RAM. It gives you raw capacity for up to four 22TB SATA drives, reaching up to 88TB in RAID 0. It handles 4K video hardware decoding and supports standard network file protocols like SMB, NFS, and SFTP. If you need a straightforward centralized media hub and backup target for your home network, this unit provides the essential specs.
Pros
- Supports up to 88TB of total storage across four 22TB drive bays
- Features hardware 4K video decoding with uPnP and DLNA streaming support
- Supports SMB, NFS, SFTP/FTP, AFP, iSCSI, and WebDAV protocols
- Accepts 3.5-inch and 2.5-inch SATA hard drives as well as 2.5-inch SATA SSDs
Cons
- System memory is fixed at 2GB RAM and cannot be upgraded
- Comes as a diskless enclosure without pre-installed storage drives
Good fit if
- You want a four-bay enclosure for home file backups and DLNA media streaming.
- You plan to supply your own 2.5-inch or 3.5-inch SATA hard drives or SSDs.
- You need cross-platform sharing over SMB, NFS, SFTP, and WebDAV protocols.
Skip if
- You need more than 2GB of system RAM for memory-intensive workloads.
- You want an enclosure that arrives with pre-installed storage drives.
Verdict: TerraMaster 4-Bay Quad-Core ARM NAS delivers high-capacity multi-drive storage and 4K media decoding for basic home networks. Its non-upgradeable 2GB memory keeps it focused strictly on entry-level backup and streaming duties.
TERRAMASTER 4-Bay All-SSD NAS
Best for: Silent, high-speed NVMe storage workloads
- Drive Bays
- 4-Bay
- Network Connectivity
- 1 x 5GbE
- Processor
- Intel N95
- RAM Capacity
- 8GB DDR5-4800
- Included Storage
- Diskless
- Processor Cores
- Quad-Core
This is a 4-bay NAS built exclusively for M.2 NVMe SSDs. It uses an Intel N95 quad-core processor and 8GB of DDR5 RAM. The unit features a single 5Gbps Ethernet port for faster data transfer. Its compact size and silent operation make it suitable for home offices. You get up to 32TB of total storage capacity across the four bays.
Pros
- Intel N95 quad-core CPU with up to 3.4GHz turbo frequency
- 8GB DDR5-4800MHz RAM for high-speed data handling
- Single 5Gbps Ethernet port for increased network throughput
- Supports four M.2 2280 NVMe SSDs up to 32TB total
Cons
- Single 5Gbps port limits multi-link redundancy options
- No mention of built-in UPS support in specifications
- All-SSD design requires separate purchase of expensive drives
Good fit if
- You need silent operation for a home office environment
- You want to maximize IOPS with NVMe SSDs
- You require 5Gbps network connectivity for faster transfers
Skip if
- You need to use traditional 3.5-inch HDDs for bulk storage
- You require multiple Ethernet ports for link aggregation
- You are on a tight budget for hardware components
Verdict: TERRAMASTER F4 SSD All-SSD NAS is a specialized storage solution for users who prioritize speed and silence over capacity and redundancy. It fits those who already own NVMe drives and need a compact, high-performance server for specific workloads.
TERRAMASTER 4-Bay Intel Quad-Core NAS
Best for: quiet 4K home media streaming
- Drive Bays
- 4-Bay
- Network Connectivity
- 2.5GbE
- Processor
- Intel x86 quad-core
- RAM Capacity
- 4GB
- Included Storage
- Diskless
- RAID Support
- TRAID, TRAID+
This 4-bay NAS features an Intel x86 quad-core processor, 4GB of RAM, and a 2.5GbE network port. It handles 4K H.265 hardware decoding for streaming apps like Plex and Jellyfin, while accepting up to 120TB across four drive bays. If you need a quiet multimedia hub and centralized backup storage with flexible TRAID redundancy, this enclosure fits your home network setup well.
Pros
- Intel x86 quad-core processor with 4GB RAM
- Hardware-level 4K H.265 video decoding support
- Single 2.5GbE port for high-speed local data transfers
- Quiet 21dB(A) rated noise level during operation
- Supports up to 120TB total storage capacity across four bays
Cons
- Ships diskless without pre-installed storage drives
- Provides only one 2.5GbE network port
Good fit if
- You run local media streaming through Plex, Emby, or Jellyfin
- You prefer tool-free drive installation and mobile-based setup without a PC
- You need quiet desktop storage suitable for office or bedroom environments
Skip if
- You need dual network ports for link aggregation or failover
- You want a turnkey NAS that includes pre-installed storage drives
Verdict: TerraMaster 4-Bay Intel Quad-Core NAS delivers responsive media streaming and high-capacity storage in an ultra-quiet 4-bay chassis. It offers a capable Intel-powered alternative for multi-user file sharing and local 4K playback.
Asustor Lockerstor 4-Bay 10GbE NAS
Best for: High RAM and 10GbE networking needs
- Drive Bays
- 4 Bay
- Network Connectivity
- Dual 5GbE, Dual 10GbE
- Processor
- AMD Ryzen Quad-Core 2.3 GHz
- RAM Capacity
- 16GB ECC DDR5
- M.2 NVMe Slots
- 4 M.2 NVMe Slots
- Included Storage
- Diskless
The Asustor AS6804T is a 4-bay NAS enclosure designed for high-performance storage needs. It features a quad-core AMD Ryzen processor running at 2.3 GHz and 16GB of ECC DDR5 RAM. The unit includes four M.2 NVMe slots for fast solid-state caching or storage. Network connectivity is provided by dual 5GbE and dual 10GbE ports. This setup suits users who need substantial memory for virtualization or heavy multitasking.
Pros
- 16GB ECC DDR5 RAM capacity
- Quad-core AMD Ryzen 2.3 GHz processor
- Four M.2 NVMe slots
- Dual 5GbE and dual 10GbE network ports
Cons
- Larger physical dimensions than standard 4-bay units
- Sold diskless with no included hard drives
- Higher power draw due to high-end components
Good fit if
- You need 16GB of RAM for virtual machines
- You require 10GbE network connectivity
- You plan to use multiple NVMe drives
Skip if
- You are on a tight budget
- You need a compact desktop footprint
- You want pre-installed hard drives
Verdict: Asustor AS6804T 4-Bay NAS with 16GB RAM is the best choice for power users who need maximum RAM and 10GbE networking. It fits those building a high-speed storage server with NVMe drives.
Specifications side by side
| Spec | QNAP 4-Bay 2.5GbE NAS Enclosure | Asustor Lockerstor 4-Bay Quad-Core NAS | Asustor AS3304T 4-Bay NAS | TerraMaster 4-Bay Multimedia NAS | TERRAMASTER 4-Bay All-SSD NAS | TERRAMASTER 4-Bay Intel Quad-Core NAS | Asustor Lockerstor 4-Bay 10GbE NAS |
|---|---|---|---|---|---|---|---|
| Drive Bays | 4 BAYS | 4-Bay | 4 Bay | 4-Bay | 4-Bay | 4-Bay | 4 Bay |
| Network Connectivity | 1x 2.5Gigabit Ethernet Port | 2x 2.5GbE | 1 x 2.5GbE | not specified | 1 x 5GbE | 2.5GbE | Dual 5GbE, Dual 10GbE |
| Processor | 2.0GHz 4-core Cortex-A55 ARM | Quad-Core 2.0GHz | Realtek RTD 1296 | ARM v8 quad-core 1.7GHz | Intel N95 | Intel x86 quad-core | AMD Ryzen Quad-Core 2.3 GHz |
| RAM Capacity | 4GB built-in | 4GB DDR4 | 2GB DDR4 | 2GB | 8GB DDR5-4800 | 4GB | 16GB ECC DDR5 |
| M.2 NVMe Slots | not specified | 2 slots | not specified | not specified | not specified | not specified | 4 M.2 NVMe Slots |
| Included Storage | No HDD | Diskless | Diskless | Diskless | Diskless | Diskless | Diskless |
| RAID Support | not specified | not specified | not specified | not specified | not specified | TRAID, TRAID+ | not specified |
| Hardware Interface | not specified | M.2 NVMe | not specified | not specified | not specified | not specified | M.2 NVMe |
| Number of Bays | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay |
| Processor Cores | Quad-Core | Quad-Core | Quad-Core | Quad-Core | Quad-Core | Quad-Core | Quad-Core |
| Intended Use | not specified | not specified | not specified | not specified | not specified | Home Users | not specified |
| Dimensions | 2.48 × 3.39 × 2.62 inches | 9.06 × 6.69 × 7.3 inches | 9.06 × 6.85 × 6.69 inches | 7.28 × 8.66 × 7.09 inches | 2.36 × 5.51 × 5.43 inches | 8.74 × 7.05 × 6.06 inches | 13 × 12 × 10 inches |
| Weight | 4.56 pounds | 6.53 pounds | 4.85 pounds | 4.6 pounds | 1.32 pounds | 4.19 pounds | not specified |
| Color | White | AS6604T | Drivestor Pro | 4-Bay, Quad-Core, F4-212 (2GB) | Black | Black | not specified |
| Model | TS-433-4G | AS6604T | AS3304T | F4-212 (2GB) | F4 SSD | F4-425 | AS6804T |
| Size | not specified | 4 Bay | 4 Bay | 11.77 x 10.79 x 7.32 inches | 5.5 inches x 5.4 inches x 2.4 inches | 4Bay, F4-425 | not specified |
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Frequently asked questions
Which NAS offers the highest RAM capacity for heavy workloads?
The Asustor Lockerstor AS6804T provides the most memory with 16GB of RAM. This configuration supports demanding tasks like virtualization and extensive media libraries. It also includes 10GbE networking ports for faster data transfer speeds across your local network compared to standard 2.5GbE connections.
What is the best option for silent NVMe storage?
The TerraMaster F4 SSD All-SSD NAS is designed specifically for silent operation. It utilizes NVMe drives for high-speed data access without the noise of spinning disks. This unit comes with 8GB of RAM and an Intel N95 processor, making it ideal for users prioritizing speed and quiet performance.
Are there alternatives with dual 2.5GbE network ports?
Yes, the Asustor Lockerstor AS6604T features dual 2.5GbE ports. This setup allows for link aggregation or separate network connections for better bandwidth management. It also includes M.2 NVMe slots for caching, offering more networking flexibility than the single-port QNAP TS-433-4G-US.
Which model is best for basic home media backup?
The Asustor Drivestor Pro AS3304T is a solid entry-level choice for basic file backup and home media storage. It features 2GB of RAM and a quad-core processor. This model suits users who do not need advanced networking features or extensive RAM expansion for their daily tasks.
Is there a quiet NAS with Intel processing power?
The TerraMaster F4-425 is an ultra-quiet 4-bay chassis powered by an Intel quad-core processor. It offers responsive media streaming and high-capacity storage for multi-user file sharing. With 4GB of RAM, it serves as a capable alternative for local 4K playback and general home network duties.
Which NAS is the most compact in size?
The TerraMaster F4 SSD All-SSD NAS is the most compact unit listed. It measures 5.51 inches in width, 5.43 inches in height, and 2.36 inches in length. Weighing only 1.32 pounds, it is significantly smaller than traditional 4-bay enclosures, making it easy to place in tight spaces.
What is the best budget-friendly 4-bay alternative?
The TerraMaster F4-212 is positioned as the best budget option for entry-level multi-drive storage. It features a quad-core ARM processor and 2GB of non-upgradeable memory. This model focuses on basic home media streaming and file backup, providing high-capacity storage without the cost of advanced features.