Ubiquiti Networks Ubiquiti 4-Bay NAS 2.5/3.5" Alternatives: 6 Similar Picks Compared
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You are looking at ubiquiti networks ubiquiti 4 bay NAS 2 5 3 5 alternatives to find a storage solution that fits your specific workflow. The original Ubiquiti UNAS-4 offers a unique mix of 2.5-inch and 3.5-inch drive bays, allowing you to combine compact SSDs with high-capacity HDDs. It also includes dual M.2 NVMe cache slots and supports Gigabit Ethernet at 2.5 speeds. This flexibility is ideal if you need to balance storage density with caching performance.
However, you might prefer a different configuration. Some users need dual 2.5GbE ports for faster local transfers, while others require 10GbE connectivity for enterprise-grade tasks. You may also want a pre-installed SSD bundle or an all-SSD setup for maximum speed. We selected these 6 alternatives because their specifications overlap with the original model. Each option shares the 4-bay form factor but varies in processor power, network interfaces, and drive compatibility. Review the specs below to see which hardware interface and connectivity options best match your needs.
Our top pick: Ubiquiti UNAS-4 White 4-Bay NAS.
How alternatives compare to Ubiquiti
Asustor Lockerstor 4-Bay Quad-Core NAS
The Asustor Lockerstor AS6604T swaps the Ubiquiti’s mixed bay flexibility for a dedicated quad-core processor and 4GB of RAM. It offers dual 2.5GbE ports for faster local transfers, making it better for media streaming or backup tasks. You give up the ability to mix 2.5-inch and 3.5-inch drives, as this unit uses standard 3.5-inch bays. It is a solid choice for home offices needing consistent performance and NVMe caching without the form factor compromises of the Ubiquiti model.
Aiffro K100 4-Bay All-SSD NAS
The Aiffro K100 is a compact, all-SSD solution powered by an Intel N100 processor. It prioritizes speed and small footprint over raw capacity, fitting easily on a desk. Unlike the Ubiquiti, which supports hybrid drive types, this NAS is designed exclusively for SSDs. It offers dual 2.5GbE connectivity for high-speed transfers. You should pick this if you manage large media files and value portability and speed over the flexible storage options and larger drive capacity available in the Ubiquiti UNAS-4.
Asustor Lockerstor 4-Bay 10GbE NAS
The Asustor AS6804T targets enterprise-grade home labs with a powerful AMD Ryzen quad-core processor and 16GB of RAM. It features dual 5GbE ports and 10GbE connectivity, far exceeding the Ubiquiti’s single 2.5GbE port. You gain significant processing power and network speed for demanding tasks. However, you lose the mixed drive bay flexibility. This unit is for users who need ECC memory support and maximum throughput, accepting the larger size and fixed 3.5-inch bay layout in exchange for performance.
LincPlus LincStation E1 4-Bay NAS
The LincPlus LincStation E1 stands out with direct HDMI output and a hybrid storage layout. It includes 4GB of RAM and a quad-core processor for local 4K streaming. Unlike the Ubiquiti, which relies on network transfers, this unit allows direct video output. You gain local privacy and simple media playback. You give up the mixed 2.5/3.5-inch bay option. This NAS is ideal for media enthusiasts who prioritize direct display connections and local playback over the network-centric design and flexible drive sizes of the Ubiquiti.
Asustor Lockerstor 4-Bay NAS with 12TB SSD
The Asustor AS6704T v2 comes with 12TB of pre-installed SSD storage, offering immediate capacity without buying drives separately. It features dual 5GbE ports and a quad-core processor. Unlike the Ubiquiti, which requires you to source and install your own drives, this bundle provides plug-and-play convenience. You gain significant pre-loaded storage and faster networking. You lose the flexibility to choose individual drive sizes or types. This is best for users who want immediate, high-capacity storage and fast networking without the setup effort of the Ubiquiti model.
QNAP 4-Bay M.2 NVMe SSD NAS
The QNAP TBS-464 is a specialized all-SSD NAS designed for high-speed performance and local media playback. It focuses entirely on NVMe storage, unlike the Ubiquiti’s hybrid bay design. You gain dedicated SSD speed for specific workloads. You give up the ability to use traditional hard drives or mix drive types. This unit is for users building high-performance all-SSD solutions who prioritize speed and local media output over the flexible storage options and mixed drive support provided by the Ubiquiti UNAS-4.
Quick picks
Our 7 picks
Ubiquiti UNAS-4 White 4-Bay NAS
Best for: Mixed drive size storage with NVMe caching
- Drive Bays
- 4-Bay
- Network Connectivity
- Gigabit Ethernet
- M.2 NVMe Slots
- 2 slots
- Form Factor
- 3.5 Inch
- Hardware Interface
- M.2 NVMe
View on Amazon: Ubiquiti UNAS-4 White 4-Bay NAS Affiliate link
This is a 4-bay NAS from Ubiquiti Networks designed for flexible storage. It features bays for both 2.5-inch and 3.5-inch drives. You also get dual M.2 NVMe SSD cache slots for performance. The unit includes a USB-C port and supports Gigabit Ethernet at 2.5 speed. It is a white, compact unit suitable for users who want mixed drive types and cache support.
Pros
- Supports both 2.5-inch and 3.5-inch HDDs
- Includes dual M.2 NVMe SSD cache slots
- USB-C connectivity option
- Gigabit Ethernet at 2.5 speed
Cons
- No mention of 2.5G or 10G Ethernet ports
- No mention of included RAM or CPU specs
- No mention of included storage drives
Good fit if
- You need to mix 2.5-inch and 3.5-inch drives
- You want to use NVMe SSDs for caching
- You prefer a compact white design
Skip if
- You require built-in 2.5G or 10G networking
- You need pre-installed hard drives
- You want a high-performance CPU for heavy tasks
Verdict: Ubiquiti 4-Bay NAS with 2.5/3.5" HDD Slots is a flexible storage solution for users who need to mix drive sizes and add NVMe caching. It suits those who value form factor flexibility over raw processing power or high-speed networking.
Asustor Lockerstor 4-Bay Quad-Core NAS
Best for: Dual 2.5GbE connectivity and NVMe caching
- 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
View on Amazon: Asustor Lockerstor 4-Bay Quad-Core NAS Affiliate link
The Asustor Lockerstor 4 AS6604T is a 4-bay NAS drive with a quad-core 2.0GHz processor and 4GB of DDR4 RAM. It features dual 2.5GbE ports and two M.2 NVMe slots for cache. This unit supports over 200 apps and includes four free IP camera licenses. It suits users needing reliable local storage with flexible expansion options for media or backups.
Pros
- Dual 2.5GbE network ports for faster throughput
- Two M.2 NVMe slots for SSD caching
- Quad-Core 2.0GHz processor handles multiple tasks
- Includes four free IP camera licenses for NVR use
Cons
- Diskless design requires you to purchase drives separately
- Only 4GB of RAM limits heavy virtualization workloads
- No mention of USB 3.2 Gen 2 ports in specs
Good fit if
- You want dual 2.5GbE ports for faster file transfers
- You need M.2 NVMe slots for SSD caching
- You plan to use the NAS as an NVR with IP cameras
Skip if
- You need pre-installed storage drives
- You require more than 4GB of RAM for heavy virtualization
- You prefer a single 1GbE connection
Verdict: Asustor Lockerstor 4 4-Bay NAS offers solid performance for home offices and small businesses. It fits users who need dual 2.5GbE connectivity and NVMe caching for media streaming or backup tasks.
Aiffro K100 4-Bay All-SSD NAS
Best for: High-speed all-SSD home or studio storage
- Drive Bays
- 4 Bays
- Network Connectivity
- 2.5GbE
- Processor
- Intel N100
- RAM Capacity
- 8GB LPDDR5 4800MHz
- M.2 NVMe Slots
- 4 slots
- Hardware Interface
- M.2 NVMe
View on Amazon: Aiffro K100 4-Bay All-SSD NAS Affiliate link
The Aiffro K100 is a compact, all-flash NAS designed for high-speed data access. It uses four M.2 NVMe SSD slots rather than traditional 3.5-inch drives. The Intel N100 processor runs at 3.40GHz with low power consumption. It includes 8GB of LPDDR5 RAM and a 2.5GbE network port. This unit suits users who need fast storage for video editing or team projects without the bulk of mechanical drives.
Pros
- Four bays for M.2 NVMe SSDs up to 16TB total
- Intel N100 processor with 3.40GHz peak speed
- 8GB LPDDR5 RAM for responsive performance
- Low 6W TDP for energy efficiency
- Compact aluminum chassis measuring 117x112x34 mm
Cons
- Requires separate purchase of NVMe SSDs
- No support for 3.5-inch HDDs
- Limited to 2.5GbE network connectivity
Good fit if
- You need maximum read/write speeds for 4K video editing
- You want a quiet, low-power storage solution
- You already own M.2 NVMe SSDs
Skip if
- You prefer to use large, inexpensive 3.5-inch hard drives
- You require 10GbE network speeds
- You need a pre-loaded system with drives included
Verdict: The Aiffro K100 4-Bay All-SSD NAS is a specialized tool for users who prioritize speed and compactness over traditional HDD capacity. It fits professionals managing large media files who already have compatible SSDs.
Asustor Lockerstor 4-Bay 10GbE NAS
Best for: High-speed enterprise-grade home labs
- 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
View on Amazon: Asustor Lockerstor 4-Bay 10GbE NAS Affiliate link
The Asustor AS6804T is a 4-bay NAS featuring an AMD Ryzen Quad-Core 2.3 GHz processor and 16GB ECC DDR5 RAM. It includes four M.2 NVMe slots and dual 5GbE plus dual 10GbE ports. This diskless unit supports four hard drives and four solid-state drives. It suits users needing high-speed connectivity and ECC memory for data integrity.
Pros
- 16GB ECC DDR5 RAM
- Dual 5GbE and dual 10GbE ports
- Four M.2 NVMe slots
- AMD Ryzen Quad-Core 2.3 GHz processor
Cons
- Sold diskless without included storage
- No mention of USB ports
- No mention of HDMI output
Good fit if
- You need ECC RAM for data protection
- You require 10GbE network speeds
- You want to use NVMe SSDs for cache
Skip if
- You need pre-installed storage
- You only have 1GbE networks
- You prefer a smaller form factor
Verdict: Asustor AS6804T 4-Bay NAS fits users who prioritize ECC memory and high-speed networking for demanding storage tasks.
LincPlus LincStation E1 4-Bay NAS
Best for: local 4K media streaming and hybrid storage
- Drive Bays
- 4-Bay
- Network Connectivity
- 2.5GbE
- Processor
- Quad-Core Cortex-A55
- RAM Capacity
- 4GB DDR4
- M.2 NVMe Slots
- 2 slots
- Included Storage
- Diskless
View on Amazon: LincPlus LincStation E1 4-Bay NAS Affiliate link
The LincPlus LincStation E1 is a 4-bay NAS with a quad-core 2.0GHz processor and 4GB RAM. It offers two SATA bays and two M.2 NVMe slots for up to 76TB of storage. A 2.5GbE port provides fast network speeds, while an HDMI 2.0 output allows direct 4K media playback. It includes 64GB eMMC storage for the OS. This unit suits users who want a local media hub without subscription fees.
Pros
- Hybrid storage with 2 SATA and 2 M.2 NVMe slots
- 2.5GbE network port for faster data transfer
- HDMI 2.0 port for direct 4K video output
- Tool-free drive installation design
- No monthly subscription fees for local storage
Cons
- Only 4GB of RAM limits heavy multitasking
- No mention of dual 2.5GbE ports for link aggregation
- Proprietary LincOS may lack advanced enterprise features
Good fit if
- You want to stream 4K media directly to a TV
- You need a mix of high-capacity HDDs and fast NVMe cache
- You prefer a tool-free setup for drive changes
Skip if
- You require dual 2.5GbE ports for link aggregation
- You need a standard enterprise-grade operating system
- You want more than 4GB of RAM for virtualization
Verdict: LincPlus LincStation E1 4-Bay NAS offers a unique hybrid storage layout and direct HDMI output for media enthusiasts. It fits users who prioritize local privacy and simple 4K streaming over advanced network redundancy.
Asustor Lockerstor 4-Bay NAS with 12TB SSD
Best for: Users wanting pre-installed SSD storage and dual 5GbE
- Drive Bays
- 4 Bay
- Network Connectivity
- Dual 5GbE
- Processor
- Intel Celeron N5105
- RAM Capacity
- 4GB DDR4
- M.2 NVMe Slots
- 4 slots
- Included Storage
- 3 x 4TB SSD
View on Amazon: Asustor Lockerstor 4-Bay NAS with 12TB SSD Affiliate link
This Asustor NAS uses an Intel Celeron N5105 quad-core processor and includes three 4TB SSDs. It features four M.2 NVMe slots and dual 5GbE ports. The unit comes with 4GB of RAM. You get a ready-to-use storage solution with pre-installed drives. The design supports Wake on LAN and WAN. It is a solid option for users needing fast local storage without configuring individual drives.
Pros
- Includes three 4TB SSDs for immediate use
- Dual 5-Gigabit Ethernet ports for high bandwidth
- Four M.2 NVMe slots for flexible caching
- Intel Celeron N5105 quad-core processor
Cons
- Only 4GB of RAM limits heavy multitasking
- Three of four bays are filled by included SSDs
- No dedicated expansion slots for additional drives
Good fit if
- You want a NAS with pre-installed SSDs
- You need dual 5GbE network connectivity
- You prefer NVMe storage for caching
Skip if
- You require more than 4GB of RAM
- You need all four bays empty for your own drives
- You prefer traditional 3.5-inch HDD bays only
Verdict: Asustor AS6704T v2 4-Bay NAS with 12TB SSD Bundle is a convenient choice for users who want immediate storage capacity and fast networking without the hassle of buying and installing drives separately.
QNAP 4-Bay M.2 NVMe SSD NAS
Best for: All-SSD storage and local media playback
- Drive Bays
- 4 Bay
- Network Connectivity
- 2 x 2.5GbE
- Processor
- Intel Quad-core
- RAM Capacity
- 8GB
- M.2 NVMe Slots
- 4 M.2 PCIe Gen3x2 NVMe
- Included Storage
- Diskless
View on Amazon: QNAP 4-Bay M.2 NVMe SSD NAS Affiliate link
The QNAP TBS-464 is a 4-bay NAS designed for high-speed storage using M.2 NVMe SSDs. It features an Intel quad-core processor with 8GB RAM and dual 2.5GbE ports. You get two HDMI 2.0 outputs for 4K media playback and transcoding. This unit suits users who need fast SSD caching or all-SSD performance with multimedia capabilities.
Pros
- Intel quad-core CPU with 8GB RAM
- 4 M.2 PCIe Gen3x2 NVMe SSD slots
- Dual 2.5GbE ports with port trunking support
- Dual HDMI 2.0 outputs for 4K playback
Cons
- No 3.5-inch HDD bays for traditional bulk storage
- Limited to 2.5GbE network speeds
- No mention of USB 3.2 or eSATA ports
Good fit if
- You want fast NVMe storage performance
- You need local 4K media playback
- You prefer SSD-only storage configurations
Skip if
- You require 3.5-inch HDD bays
- You need 10GbE network connectivity
- You want to connect via USB 3.2
Verdict: QNAP TBS-464 4-Bay NVMe NAS is a specialized unit for users who prioritize SSD speed and local media output over traditional hard drive capacity. It fits those building high-performance all-SSD storage solutions.
Specifications side by side
| Spec | Ubiquiti UNAS-4 White 4-Bay NAS | Asustor Lockerstor 4-Bay Quad-Core NAS | Aiffro K100 4-Bay All-SSD NAS | Asustor Lockerstor 4-Bay 10GbE NAS | LincPlus LincStation E1 4-Bay NAS | Asustor Lockerstor 4-Bay NAS with 12TB SSD | QNAP 4-Bay M.2 NVMe SSD NAS |
|---|---|---|---|---|---|---|---|
| Drive Bays | 4-Bay | 4-Bay | 4 Bays | 4 Bay | 4-Bay | 4 Bay | 4 Bay |
| Network Connectivity | Gigabit Ethernet | 2x 2.5GbE | 2.5GbE | Dual 5GbE, Dual 10GbE | 2.5GbE | Dual 5GbE | 2 x 2.5GbE |
| Processor | not stated | Quad-Core 2.0GHz | Intel N100 | AMD Ryzen Quad-Core 2.3 GHz | Quad-Core Cortex-A55 | Intel Celeron N5105 | Intel Quad-core |
| RAM Capacity | not stated | 4GB DDR4 | 8GB LPDDR5 4800MHz | 16GB ECC DDR5 | 4GB DDR4 | 4GB DDR4 | 8GB |
| M.2 NVMe Slots | 2 slots | 2 slots | 4 slots | 4 M.2 NVMe Slots | 2 slots | 4 slots | 4 M.2 PCIe Gen3x2 NVMe |
| Included Storage | not stated | Diskless | not stated | Diskless | Diskless | 3 x 4TB SSD | Diskless |
| Form Factor | 3.5 Inch | not stated | not stated | not stated | not stated | not stated | not stated |
| Hardware Interface | M.2 NVMe | M.2 NVMe | M.2 NVMe | M.2 NVMe | SATA, M.2 NVMe, HDMI | M.2 NVMe, HDMI | M.2 NVMe |
| Number of Bays | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay | 4-Bay |
| Processor Cores | not stated | Quad-Core | not stated | Quad-Core | Quad-Core | Quad-Core | Quad-Core |
| Dimensions | not stated | 9.06 × 6.69 × 7.3 inches | 4.61 × 4.41 × 1.34 inches | 13 × 12 × 10 inches | not stated | 10 × 12 × 13 inches | not stated |
| Weight | not stated | 6.53 pounds | 14.1 ounces | not stated | 2 pounds | 11.9 pounds | not stated |
| Color | White | AS6604T | white | not stated | not stated | not stated | Black |
| Model | UNAS-4-W | AS6604T | K100 | AS6804T | not stated | not stated | TBS-464 |
| Size | not stated | 4 Bay | 256G | not stated | not stated | 3X4TB | not stated |
Frequently asked questions
Which NAS supports mixing 2.5 and 3.5-inch drives?
The Ubiquiti UNAS-4 is the only unit in this list designed for mixed drive sizes. It features slots for both 2.5-inch and 3.5-inch drives. This allows you to combine compact SSDs with high-capacity HDDs. Other alternatives like the Asustor AS6604T or Aiffro K100 use uniform bays for either SSDs or HDDs, not both simultaneously.
Which model offers the fastest network connectivity?
The Asustor AS6804T provides the highest network speeds with 10GbE and 5GbE ports. It is built for high-throughput tasks and enterprise-grade home labs. The Asustor AS6604T and Aiffro K100 offer dual 2.5GbE connections, which are faster than standard Gigabit but slower than the 10GbE option found in the premium Asustor model.
What is the best option for an all-SSD setup?
The Aiffro K100 is a dedicated all-SSD NAS built for speed. It uses M.2 NVMe drives and an Intel N100 processor. The QNAP TBS-464 is also designed for all-SSD storage with M.2 NVMe interfaces. These units prioritize performance over the large capacities typical of traditional HDD-based NAS drives.
Which NAS includes pre-installed storage capacity?
The Asustor AS6704T v2 bundle comes with three 4TB SSDs already installed. This gives you immediate 12TB of usable space without buying drives separately. Most other units, including the Ubiquiti UNAS-4 and Asustor AS6804T, are sold as barebones enclosures requiring you to purchase and install your own storage media.
Which model has HDMI output for local playback?
The LincPlus LincStation E1 and the Asustor AS6704T v2 both include HDMI ports. This feature allows you to connect the NAS directly to a TV or monitor for local 4K media streaming. The Ubiquiti UNAS-4 and Asustor AS6804T do not list HDMI connectivity, focusing instead on network-based access and data management.
Which NAS has the most RAM capacity?
The Asustor AS6804T features 16GB of RAM, the highest amount in this group. It also includes ECC memory support for data integrity. The Asustor AS6604T, LincPlus LincStation E1, and Asustor AS6704T v2 each have 4GB of RAM. The Ubiquiti UNAS-4 and QNAP TBS-464 do not list specific RAM amounts in their published specifications.
Which unit is the most compact and lightweight?
The Aiffro K100 is the most compact option, measuring 4.41 x 1.34 x 4.61 inches and weighing 14.1 ounces. Its small form factor suits desktop use. In contrast, the Asustor AS6804T is significantly larger at 12 x 10 x 13 inches. The Ubiquiti UNAS-4 and LincPlus LincStation E1 fall in between these size extremes.