6 Best Alternatives to the Synology 2-Bay Expandable Desktop NAS (2026)
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You are looking for synology ds725 expandable NAS storage alternatives because the original unit may not fit your specific needs. The Synology DS725+ excels at providing scalable storage and professional surveillance features for home users. It offers a compact 2-bay design that can expand to 140TB with an external unit. However, you might prefer a different size, a pre-installed drive, or a simpler interface. Some users want faster networking speeds or a lower price point without sacrificing reliability.
We selected these options because their specifications overlap with the original product. All listed devices are 2-bay NAS units intended for home use. This list includes models from brands like Buffalo, UGREEN, Asustor, Yxk, and QNAP. Each device offers distinct advantages, such as included storage, Intel N100 processing power, or 2.5GbE connectivity. You can compare these specs to find the best fit for your data protection and media sharing requirements. The goal is to help you choose a device that matches your technical preferences and space constraints.
Our top pick: Synology 2-Bay Expandable Desktop NAS.
How each alternative compares
Buffalo LinkStation 220 4TB 2-Bay NAS
The Buffalo LinkStation 220 includes 4TB of storage in the box, whereas the Synology DS725+ is diskless. This makes the Buffalo a ready-to-use option for home users who want simple backup without buying drives separately. It lacks the expandability of the Synology, which supports up to 140TB via expansion units. The Buffalo focuses on straightforward file sharing and Windows compatibility. You should choose this if you need immediate storage capacity and do not require advanced surveillance or RAID configuration features. It is a solid choice for basic data security over complex network management.
UGREEN 2-Bay Intel N100 NAS
The UGREEN DXP2800 uses an Intel N100 processor, offering significantly more raw processing power than the Synology DS725+. This makes it better suited for content creators running media servers or virtualization tasks. Like the Synology, it is a diskless 2-bay unit, allowing you to scale storage as needed. However, it targets advanced home users rather than those seeking simple surveillance management. The UGREEN unit is slightly larger and heavier. You should pick this if you prioritize computational performance for creative workflows over the specialized security camera analytics provided by the Synology platform.
Asustor Drivestor 2 Gen 2 Two-Bay NAS
The Asustor AS1202T is positioned as a budget-friendly entry-level option. It offers a simpler setup process compared to the feature-rich Synology DS725+. While the Synology supports extensive surveillance with up to 30 IP cameras, the Asustor focuses on basic home storage and fast networking. It is a practical choice for users who do not need multi-site camera management or complex snapshot technologies. The Asustor is compact and lightweight. You should choose this if you want quick connectivity and easy configuration without paying for advanced enterprise-grade features like multi-site surveillance or extensive expansion capabilities.
Yxk Zero1 2-Bay 2.5GbE NAS
The Yxk Zero1 distinguishes itself with 2.5GbE networking speed, which is faster than the standard Gigabit Ethernet often found in similar budget units. Like the Synology, it is a diskless 2-bay desktop NAS designed for home users. It prioritizes speed and simplicity over complex feature sets. The Yxk is compact and quiet, making it suitable for personal media libraries. You should select this if you already own hard drives and want a fast, efficient hub for transferring large files. It lacks the advanced surveillance and expansion options of the Synology, focusing instead on core storage performance and network throughput.
QNAP 2-Bay USB-C Direct Attached Storage
The QNAP TR-002 is a Direct Attached Storage device, not a full network-attached storage system. It connects via USB-C to expand an existing QNAP NAS, whereas the Synology DS725+ is a standalone NAS. This unit provides secure, high-speed local storage but does not offer independent network access or surveillance features. It is a specialized expansion tool for QNAP users. You should choose this only if you already own a QNAP NAS and need additional local capacity. It is not a replacement for the Synology if you need a standalone network storage solution with its own IP address and management interface.
QNAP TS-233 2-Bay NAS
The QNAP TS-233 includes 2GB of RAM and a quad-core processor, providing solid basic performance for home users. It offers snapshot protection for data safety, similar to the Synology's multi-layered protection. However, it lacks the extensive surveillance capabilities and expansion options of the DS725+. The QNAP is a straightforward desktop NAS designed for simple setup and data protection. You should pick this if you value snapshot technology and basic processing power over advanced camera management and massive storage scalability. It is a practical alternative for users who need reliable data protection without the complexity of multi-site surveillance.
Quick picks
Our 7 picks
Synology 2-Bay Expandable Desktop NAS
Best for: home users needing surveillance and scalable storage
- Drive Bays
- 2-Bay
- Included Storage
- Diskless
- Intended Use
- Home Users
- Dimensions
- 8.78 × 4.17 × 6.54 inches
- Weight
- 3.33 pounds
View on Amazon: Synology 2-Bay Expandable Desktop NAS Affiliate link
The Synology DS725+ is a 2-bay NAS drive designed for home users who need scalable storage. It supports expansion via a DX525 unit to reach 140TB. The device includes multi-layered data protection with RAID and snapshots. It also handles professional surveillance for up to 30 IP cameras. Its compact black chassis measures 166 mm by 106 mm by 223 mm and weighs 3.33 pounds.
Pros
- Expandable to 140TB with DX525 unit
- Supports up to 30 IP cameras
- Includes RAID and snapshot protection
- 3-year warranty included
Cons
- Limited to 2 drive bays initially
- No internal hard drives included
- Lacks mention of USB ports or eSATA
Good fit if
- You need to start small and scale storage later
- You want to manage multiple security cameras
- You prioritize data protection with RAID and snapshots
Skip if
- You need immediate high capacity without expansion units
- You require a diskless unit for budget reasons only
- You prefer a 4-bay configuration for larger arrays
Verdict: Synology DS725+ 2-Bay Expandable NAS offers a solid foundation for home users needing surveillance and scalable storage. It fits those who value data protection and future expansion over immediate bulk capacity.
Buffalo LinkStation 220 4TB 2-Bay NAS
Best for: Simple home backup and secure file sharing
- Drive Bays
- 2-Bay
- Included Storage
- 4TB
- RAID Support
- RAID 0, RAID 1
- Intended Use
- Home Users
- Dimensions
- 5.04 × 10 × 8.82 inches
- Weight
- 1 pounds
View on Amazon: Buffalo LinkStation 220 4TB 2-Bay NAS Affiliate link
The BUFFALO LinkStation 220 is a 2-bay NAS with 4TB of included storage. It supports RAID 0 and RAID 1 for data protection or speed. The device uses a closed system to reduce vulnerabilities and includes SSL encryption. It works with Windows and macOS 15 and earlier. You get a central backup location for multiple computers. This model suits home users who want simple, secure storage without monthly fees.
Pros
- Includes 4TB of storage in two 2TB drives
- Supports RAID 0 and RAID 1 configurations
- Closed system design reduces third-party vulnerabilities
- Includes SSL encryption for secure file transfers
- Compatible with Windows and macOS 15 and earlier
Cons
- Limited to macOS 15 and earlier; no support for macOS 26
- Lacks advanced cloud capabilities found in higher-end models
- No mention of USB Type-C direct attach storage features
Good fit if
- You want a simple, subscription-free personal cloud for photos and videos
- You need automatic backups for multiple computers on a home network
- You prefer a closed system for reduced security vulnerabilities
Skip if
- You use macOS 26 (Sequoia) or newer
- You need advanced cloud features or third-party app support
- You require USB Type-C direct attach storage functionality
Verdict: BUFFALO LinkStation 220 4TB NAS is a solid choice for home users who value data security and simplicity over advanced features. It fits those who want a straightforward backup solution for Windows and older macOS systems.
UGREEN 2-Bay Intel N100 NAS
Best for: Advanced home users running media servers
- Drive Bays
- 2-Bay
- Network Connectivity
- 2.5GbE
- Processor
- Intel N100
- RAM Capacity
- 8GB DDR5
- M.2 NVMe Slots
- 2x M.2 NVMe
- Included Storage
- Diskless
View on Amazon: UGREEN 2-Bay Intel N100 NAS Affiliate link
The UGREEN DXP2800 is a 2-bay NAS designed for advanced home users and creators. It features an Intel N100 processor, 8GB DDR5 RAM, and dual M.2 NVMe slots. The unit includes 2.5GbE networking and supports up to 80TB of storage. You can run Docker, virtual machines, and media server apps like Plex. It also offers AI-powered surveillance and photo management features for centralized data control.
Pros
- Intel N100 quad-core processor handles heavy workloads
- 8GB DDR5 RAM supports demanding applications
- Dual M.2 NVMe slots for fast SSD caching
- 2.5GbE networking for faster local transfers
- Supports Docker and virtual machine installations
Cons
- Sold diskless with no included hard drives
- No mention of USB 3.0 ports for external backup
- Larger physical footprint than basic 2-bay models
Good fit if
- You need local Plex media server performance
- You run Docker containers or virtual machines
- You want AI photo and surveillance features
Skip if
- You prefer a plug-and-play simple setup
- You want included storage drives
- You only need basic file sharing
Verdict: UGREEN DXP2800 2-Bay Intel N100 NAS suits creators who need raw processing power for media and virtualization. It is not for users seeking a simple, drive-included storage box.
Asustor Drivestor 2 Gen 2 Two-Bay NAS
Best for: Home users seeking simple setup and fast networking
- Drive Bays
- 2-Bay
- Network Connectivity
- 2.5GbE
- Processor
- Realtek RTD1619B
- RAM Capacity
- 1GB DDR4
- Included Storage
- Diskless
- Intended Use
- Home Users
View on Amazon: Asustor Drivestor 2 Gen 2 Two-Bay NAS Affiliate link
The Asustor AS1202T is a 2-bay NAS designed for home users who need a reliable personal cloud. It uses a Realtek RTD1619B quad-core 1.7GHz CPU and 1GB DDR4 RAM to handle daily file storage and backup tasks. The 2.5GbE network port offers faster transfer speeds than standard Gigabit connections. Tool-free drive installation makes setup easy for beginners.
Pros
- 2.5GbE Ethernet for faster data transfers
- Realtek RTD1619B quad-core 1.7GHz processor
- 1GB DDR4 memory for stable multitasking
- Tool-free drive installation for easy setup
Cons
- 1GB RAM is lower than many competitors
- No mention of expandability or eSATA ports
- Limited to 2-bay capacity for larger needs
Good fit if
- You want faster speeds than Gigabit Ethernet
- You need a simple tool-free setup
- You are a home user with basic needs
Skip if
- You need high-end multitasking performance
- You require expandability beyond two drives
- You need advanced enterprise features
Verdict: Asustor AS1202T 2-Bay Home NAS is a practical entry-level option for home users who value quick setup and faster network speeds over raw processing power.
Yxk Zero1 2-Bay 2.5GbE NAS
Best for: simple home storage with 2.5GbE speed
- Drive Bays
- 2-Bay
- Network Connectivity
- 2.5GbE
- Included Storage
- Diskless
- Form Factor
- Desktop
- Intended Use
- Home Users
- Dimensions
- 6.7 × 4.1 × 9 inches
View on Amazon: Yxk Zero1 2-Bay 2.5GbE NAS Affiliate link
The Yxk Zero1 is a 2-bay desktop NAS designed for home users who want a simple, private storage hub. It features 2.5GbE connectivity for faster file transfers and 4K streaming compared to standard 1GbE models. The unit is diskless, meaning you purchase drives separately. It includes Docker support and remote access via app or browser, making it a practical entry-level option for personal media and file backup.
Pros
- 2.5GbE network port for faster local transfers
- Docker support for advanced home use
- Remote access via mobile app and web browser
- Compact 2-bay desktop form factor
Cons
- Sold diskless; hard drives are not included
- No mention of built-in display or hardware controls
- Basic feature set compared to expandable competitors
Good fit if
- You want faster 2.5GbE speeds without buying a high-end model
- You prefer a simple setup for personal photo and video backup
- You already own hard drives and want a diskless chassis
Skip if
- You need pre-installed drives for immediate use
- You require extensive expandability or RAID configurations
- You want a dedicated hardware display for status monitoring
Verdict: The Yxk Zero1 2-Bay Desktop NAS fits users who prioritize 2.5GbE speed and simplicity over complex features. It is a solid choice for home users who already have drives and want a quiet, compact hub for personal media.
QNAP 2-Bay USB-C Direct Attached Storage
Best for: expanding existing QNAP NAS capacity
- Drive Bays
- 2-Bay
- Included Storage
- Diskless
- RAID Support
- RAID 0, 1, JBOD
- Dimensions
- 8.86 × 4.02 × 6.63 inches
- Weight
- 2.65 pounds
View on Amazon: QNAP 2-Bay USB-C Direct Attached Storage Affiliate link
The QNAP TR-002 is a 2-bay direct-attached storage device designed for high-speed expansion via USB Type-C. It supports SATA drives and offers hardware RAID 0, 1, and JBOD configurations. This unit serves as an external storage solution or a capacity booster for existing QNAP NAS systems. Its compact build and lockable bays make it a practical addition for users needing reliable local storage without network overhead.
Pros
- USB Type-C connection for high-speed data transfer
- Hardware RAID support for RAID 0, 1, and JBOD
- Lockable drive bays for physical security
- Compatible with Windows, macOS, and Linux
Cons
- Requires a separate QNAP NAS to function as expansion storage
- No built-in network ports for standalone NAS operation
- Limited to USB connectivity without Ethernet options
Good fit if
- You own a QNAP NAS and need more local storage capacity
- You require hardware RAID redundancy for critical data
- You want a secure, lockable external drive enclosure
Skip if
- You need a standalone NAS without an existing QNAP system
- You require network-attached storage with built-in Ethernet ports
- You prefer a wireless storage solution
Verdict: QNAP TR-002 2-Bay USB-C DAS is a specialized expansion unit for QNAP NAS owners. It provides secure, high-speed local storage but does not replace a full network-attached storage system.
QNAP TS-233 2-Bay NAS
Best for: home users needing basic NAS with snapshot protection
- Drive Bays
- 2 Bay
- Network Connectivity
- 1x Gb LAN
- Processor
- ARM Cortex-A55 Quad-core 2.0 GHz
- RAM Capacity
- 2 GB RAM
- Form Factor
- Desktop
- Dimensions
- 7.4 × 3.54 × 6.14 inches
View on Amazon: QNAP TS-233 2-Bay NAS Affiliate link
The QNAP TS-233 is a 2-bay desktop NAS built for home storage. It uses a 64-bit Cortex-A55 quad-core processor running at 2.0 GHz. You get 2 GB of RAM for handling files. The unit includes one gigabit LAN port for network connections. It features snapshot protection to help guard against ransomware. This setup suits users who need reliable, affordable personal cloud storage without complex enterprise features.
Pros
- Cortex-A55 quad-core 2.0 GHz processor
- 2 GB RAM capacity
- Snapshot protection for ransomware defense
- Compact desktop form factor
Cons
- Only one gigabit LAN port
- 2 GB RAM limits heavy multitasking
- No mention of USB expansion ports
Good fit if
- You need a basic 2-bay NAS for home use
- You want snapshot protection for data safety
- You prefer a minimalist desktop design
Skip if
- You require multiple network ports for bonding
- You need more than 2 GB of RAM
- You want a larger enterprise-grade system
Verdict: QNAP TS-233 2-Bay NAS with 2GB RAM offers solid basic performance for home users who value data protection snapshots and a simple setup.
Specifications side by side
| Spec | Synology 2-Bay Expandable Desktop NAS | Buffalo LinkStation 220 4TB 2-Bay NAS | UGREEN 2-Bay Intel N100 NAS | Asustor Drivestor 2 Gen 2 Two-Bay NAS | Yxk Zero1 2-Bay 2.5GbE NAS | QNAP 2-Bay USB-C Direct Attached Storage | QNAP TS-233 2-Bay NAS |
|---|---|---|---|---|---|---|---|
| Drive Bays | 2-Bay | 2-Bay | 2-Bay | 2-Bay | 2-Bay | 2-Bay | 2 Bay |
| Network Connectivity | not stated | not stated | 2.5GbE | 2.5GbE | 2.5GbE | not stated | 1x Gb LAN |
| Processor | not stated | not stated | Intel N100 | Realtek RTD1619B | not stated | not stated | ARM Cortex-A55 Quad-core 2.0 GHz |
| RAM Capacity | not stated | not stated | 8GB DDR5 | 1GB DDR4 | not stated | not stated | 2 GB RAM |
| M.2 NVMe Slots | not stated | not stated | 2x M.2 NVMe | not stated | not stated | not stated | not stated |
| Included Storage | Diskless | 4TB | Diskless | Diskless | Diskless | Diskless | not stated |
| RAID Support | not stated | RAID 0, RAID 1 | not stated | not stated | not stated | RAID 0, 1, JBOD | not stated |
| Form Factor | not stated | not stated | not stated | not stated | Desktop | not stated | Desktop |
| Hardware Interface | not stated | not stated | M.2 NVMe, HDMI | not stated | not stated | not stated | not stated |
| Number of Bays | 2-Bay | 2-Bay | 2-Bay | 2-Bay | 2-Bay | 2-Bay | 2-Bay |
| Target Audience | not stated | not stated | Content Creators | not stated | not stated | not stated | not stated |
| Processor Cores | not stated | not stated | not stated | not stated | not stated | not stated | Quad-Core |
| Intended Use | Home Users | Home Users | Home Users | Home Users | Home Users | not stated | not stated |
| Dimensions | 8.78 × 4.17 × 6.54 inches | 5.04 × 10 × 8.82 inches | 9.33 × 4.29 × 6.97 inches | 3.94 × 3.94 × 3.94 inches | 6.7 × 4.1 × 9 inches | 8.86 × 4.02 × 6.63 inches | 7.4 × 3.54 × 6.14 inches |
| Weight | 3.33 pounds | 1 pounds | 2.58 pounds | 2.56 pounds | 2.64 pounds | 2.65 pounds | 2.2 pounds |
| Size | 166 mm x 106 mm x 223 mm | 4TB (2x2TB) | DXP2800,2-Bay | 2 Bay | 2-Bay | DAS | Enclosure |
| Color | Black | Black | Grey | Black | Black | Clear | Enclosure |
| Model | DS725+ | LS220D0402 | DXP2800,2-Bay (Diskless) | AS1202T | not stated | TR-002 | TS-233 |
If you need a larger mid tower chassis, compare rosewill helium NAS alternatives for higher drive bay counts.
Frequently asked questions
Which NAS is best for media servers?
The UGREEN DXP2800 is the top choice for advanced home users running media servers. It features an Intel N100 processor that provides the raw processing power needed for media transcoding and virtualization. This unit is diskless, so you must purchase drives separately. It suits creators who need performance over simple plug-and-play storage.
What is the most budget-friendly option?
The Asustor AS1202T is the best budget pick for home users. It offers a practical entry-level design with fast networking speeds for quick setup. This model focuses on simplicity and connectivity rather than high-end processing power. It is a solid choice if you want a straightforward NAS without complex features or high costs.
Which NAS includes drives in the box?
The Buffalo LinkStation 220 includes 4TB of storage, consisting of two 2TB drives. This makes it a ready-to-use option for home users who want simple backup solutions without buying drives separately. It is designed for Windows and older macOS systems, prioritizing data security and ease of use over advanced customization.
Can I expand my existing QNAP NAS?
Yes, the QNAP TR-002 is a specialized expansion unit for QNAP NAS owners. It connects via USB-C to provide secure, high-speed local storage. This device is a Direct Attached Storage (DAS) unit, not a full network-attached storage system. It is ideal for increasing capacity on your existing QNAP setup rather than replacing it.
Which NAS has the fastest network speed?
The Yxk Zero1 supports 2.5GbE networking, offering faster data transfer speeds than standard Gigabit models. This desktop NAS is designed for users who prioritize speed and simplicity for personal media libraries. It is a compact, quiet hub that fits well in home environments where quick access to large files is essential.
Does the QNAP TS-233 have snapshot protection?
Yes, the QNAP TS-233 offers snapshot protection for data safety. It includes 2GB of RAM and a quad-core processor to handle basic NAS tasks efficiently. This model is suitable for home users who value data protection and a simple setup process. It provides solid performance for everyday storage needs without complex configurations.
Which NAS is best for surveillance?
The Synology DS725+ is best for home users needing surveillance features. It provides a solid foundation for security camera integration and scalable storage. This 2-bay unit allows for future expansion as your camera count grows. It fits users who prioritize data protection and advanced surveillance capabilities over immediate bulk storage capacity.