Synology 4-Bay 1U RackStation 48TB Alternatives: 6 Similar Picks Compared

How these alternatives compare

Synology 1U 4-Bay Rackmount NAS with 32GB RAM

This model shares the 1U rackmount form factor and AMD Ryzen processor found in the RS422+, but upgrades RAM to 32GB. That 16-fold increase in memory supports heavier edge computing tasks and faster data processing. It includes SSD storage rather than the high-capacity HDDs in the 48TB unit, prioritizing speed over raw volume. The 1GbE network connectivity remains the same, so it does not offer faster throughput for large file transfers. You should choose this option if your workflow demands low latency and high memory for virtualization or caching, rather than massive archival storage. It is better for branch offices needing performance, while the RS422+ suits those needing bulk capacity.

Synology 4-Bay 1U Rackmount NAS with 32TB

This unit is nearly identical to the original RS422+ in hardware, featuring the same AMD Ryzen processor, 2GB ECC RAM, and 1GbE ports. The main difference is the included storage capacity, which is 32TB instead of 48TB. Both are 4-bay rackmount solutions with the same compact 1U design. You lose 16TB of space with this alternative, but the core performance and feature set remain consistent. This model is a viable choice if you find a better price for the 32TB configuration or if your data needs are slightly lower. It offers the same Synology DSM experience and data protection features, making it a direct substitute for users who do not require the maximum 48TB capacity.

Synology 2-Bay 8TB NAS

This NAS differs significantly by using a desktop form factor instead of a 1U rackmount chassis. It has only two drive bays and includes 8TB of storage, compared to the four bays and 48TB of the original. The processor is a quad-core AMD chip, similar in brand but likely different in architecture, and it also includes 2GB of RAM. Network connectivity is limited to 1GbE, matching the original. This option is best for home users or small offices that do not need rack mounting or high capacity. It sacrifices expandability and density for simplicity and a smaller footprint. You should pick this if you need basic file storage without the complexity of a rackmount system or the need for 48TB.

Synology DS223j 16TB SSD NAS

This model uses 2.5-inch SSDs instead of 3.5-inch HDDs, offering 16TB of storage in a two-bay desktop chassis. It features a quad-core processor and 1GbE connectivity, similar to the original’s speed but with less RAM capacity. The SSDs provide faster read/write speeds and lower power consumption, but the total capacity is much lower than the 48TB HDD array. The 1U rackmount form factor is absent, making it suitable for desks or small spaces. You should choose this if you prioritize speed and quiet operation over raw storage volume. It is ideal for users who need fast access to smaller datasets rather than archiving large media libraries or extensive backups.

Asustor Lockerstor 16 Pro 16-Bay Rackmount NAS

This Asustor NAS is a 16-bay rackmount unit with 16GB of RAM and 10GbE networking, far exceeding the RS422+ in capacity and speed. It uses an 8-core AMD Ryzen processor, offering significantly more compute power than the dual-core in the original. The 10GbE ports provide much higher throughput for data-heavy workflows, while the 1GbE port offers standard connectivity. It is designed for enterprise-grade reliability and high-density storage. You should pick this if you need massive expansion and fast network speeds, accepting the higher cost and complexity. It is not a direct substitute for basic storage but a superior choice for heavy data workloads requiring robust networking and processing power.

Synology DS723+ 2-Bay Ryzen NAS

This Synology unit is a 2-bay desktop NAS with 32GB of RAM and an AMD Ryzen processor, differing in form factor and capacity from the 4-bay rackmount original. It includes M.2 NVMe support for cache or additional storage, which the RS422+ lacks. The 1GbE network connectivity is the same, limiting large file transfer speeds. It offers 32GB of RAM, vastly more than the 2GB in the original, making it better for virtualization or heavy multitasking. You should choose this if you need high memory and fast NVMe speeds in a compact desktop size. It sacrifices the 48TB HDD capacity and rackmount convenience for performance and expandability via NVMe drives.

Quick picks

Our 7 picks

1 Best overall

Synology 4-Bay 1U RackStation with 48TB

Best for: Small offices needing 48TB in a 1U rack

Drive Bays

4-bay

Network Connectivity

2 x 1GbE

Processor

Ryzen R1600

RAM Capacity

2GB DDR4 ECC UDIMM

Included Storage

48TB

View on Amazon: Synology 4-Bay 1U RackStation with 48TB Affiliate link

This 1U rackmount NAS includes four 12TB drives for 48TB of total storage. It uses a Ryzen R1600 2.6GHz CPU and 2GB of ECC memory. The unit features dual 1GbE ports for network connectivity. It runs the Synology DSM operating system for data management. This setup suits small offices needing high capacity in a compact form factor. You get an all-in-one solution for daily backup and file sharing tasks.

Pros

• Includes 48TB of pre-installed SATA 3.5-inch HDD storage
• Ryzen R1600 2.6GHz processor with up to 3.1GHz turbo
• 1U rackmount form factor saves desk space
• Dual 1GbE LAN ports for network connectivity

Cons

• Only 2GB of RAM limits heavy multitasking
• 1GbE ports lack 2.5GbE speed upgrades
• Memory is not expandable beyond the included 2GB

Good fit if

• You need 48TB of storage in a 1U rack
• You run small business backup and sync tasks
• You prefer a compact all-in-one server solution

Skip if

• You require 2.5GbE network speeds
• You need more than 4 drive bays
• You plan to run memory-intensive virtual machines

Verdict: Synology RS422+ 4-Bay 48TB NAS fits small teams needing high capacity in a 1U rack. It lacks the RAM and speed of larger models, making it ideal for basic storage and backup roles.

2 Also great

Synology 1U 4-Bay Rackmount NAS with 32GB RAM

Best for: Edge storage with high RAM and SSDs

Drive Bays

4-bay

Network Connectivity

4 x 1GbE

Processor

Ryzen R1500B

RAM Capacity

32GB DDR4 ECC SODIMM

Included Storage

8TB

View on Amazon: Synology 1U 4-Bay Rackmount NAS with 32GB RAM Affiliate link

This Synology RackStation RS822+ is a 1U edge storage solution for branch offices. It includes a Ryzen R1500B 4-core CPU, 32GB DDR4 ECC memory, and pre-installed 8TB of SSD storage. You get four 1GbE LAN ports for connectivity. The unit supports DSM features like Hyper Backup and Snapshot Replication. It suits small businesses needing fast, compact data management and multi-endpoint protection.

Pros

• Includes 32GB DDR4 ECC SODIMM memory
• Pre-installed 8TB SATA 2.5" SSD storage
• Ryzen R1500B 4-core 2.2GHz processor
• Four 1GbE LAN ports
• Compact 1U rackmount design

Cons

• Limited to 1GbE network speeds
• Only four drive bays
• No 2.5GbE or 10GbE connectivity

Good fit if

• You need a compact 1U edge storage solution
• You want pre-installed SSD storage for speed
• You require 32GB of ECC memory

Skip if

• You need 2.5GbE or 10GbE networking
• You require more than four drive bays
• You prefer desktop form factors over rackmount

Verdict: Synology RS822+ 4-Bay Edge NAS provides high memory and SSD storage in a small 1U chassis. It fits branch offices needing fast edge computing without high-speed network upgrades.

3 Also great

Synology 4-Bay 1U Rackmount NAS with 32TB

Best for: Small businesses needing high-capacity rack storage

Drive Bays

4-Bay

Network Connectivity

2 x 1GbE

Processor

Ryzen R1600

RAM Capacity

2GB DDR4 ECC UDIMM

Included Storage

32TB

View on Amazon: Synology 4-Bay 1U Rackmount NAS with 32TB Affiliate link

The Synology RS422+ is a 4-bay 1U rack server with a Ryzen R1600 CPU and 2GB ECC memory. It includes 32TB of storage across four 8TB drives. You get two 1GbE ports for connectivity. This model suits users needing high capacity in a compact form factor. It runs the DSM operating system for data management and backup. The unit is designed for small businesses or home labs requiring reliable storage.

Pros

• Includes 32TB of SATA 3.5" HDD storage
• Ryzen R1600 2-Core 2.6GHz processor
• 2GB DDR4 ECC UDIMM memory
• Compact 1U rack form factor

Cons

• Only 2GB of RAM limits multitasking
• 1GbE ports lack 2.5GbE speed
• No expansion slots for memory upgrades

Good fit if

• You need 32TB of pre-installed storage
• You require a 1U rackmount chassis
• You prioritize data protection features

Skip if

• You need more than 2GB of RAM
• You require 2.5GbE network speeds
• You want a 2-bay desktop unit

Verdict: Synology RS422+ 4-Bay NAS provides ample storage in a small chassis, but its 2GB RAM and 1GbE ports limit performance for heavy workloads.

4 Best budget

Synology 2-Bay 8TB NAS

Best for: Basic home file storage and backup

Drive Bays

2-Bay

Network Connectivity

1 x RJ-45 1GbE

Processor

Realtek RTD1619B

RAM Capacity

2 GB DDR4

Included Storage

8TB

Processor Cores

Quad-Core

View on Amazon: Synology 2-Bay 8TB NAS Affiliate link

The Synology DS223 is a 2-bay NAS featuring a Realtek RTD1619B quad-core 1.7 GHz processor and 2 GB of DDR4 RAM. It includes one 1GbE LAN port and three USB 3.2 Gen 1 ports. This unit comes with 8TB of storage. It suits users who need a compact, entry-level solution for basic file sharing and backup tasks without requiring high-speed network connectivity.

Pros

• Realtek RTD1619B quad-core 1.7 GHz processor
• Includes 8TB of pre-installed storage
• Three USB 3.2 Gen 1 ports
• Compact 2-bay design

Cons

• Only one 1GbE LAN port
• 2 GB RAM limits heavy multitasking
• Lacks 2.5GbE or 10GbE connectivity

Good fit if

• You need a simple 2-bay NAS for home use
• You want included storage to start immediately
• You only require 1GbE network speeds

Skip if

• You need 2.5GbE or faster network speeds
• You require more than two drive bays
• You plan to run memory-intensive virtual machines

Verdict: Synology DS223 2-Bay NAS with 8TB is a solid entry-level choice for users who prioritize simplicity and included storage over high-speed networking or expandable memory.

5 Best 2.5 inch

Synology DS223j 16TB SSD NAS

Best for: quiet, low-power 2.5-inch SSD storage

Drive Bays

2-Bay

Network Connectivity

1GbE

Processor

RTD1619B 4-Core 1.7GHz

RAM Capacity

1GB DDR4

Included Storage

16TB

Form Factor

2.5 Inch

View on Amazon: Synology DS223j 16TB SSD NAS Affiliate link

This Synology DiskStation DS223j is a 2-bay NAS built for speed and efficiency. It includes two 8TB 2.5-inch SSDs for fast data access. The RTD1619B quad-core 1.7GHz CPU handles tasks smoothly. It uses 1GB of DDR4 memory and a 1GbE port. The Btrfs file system adds data protection. It suits users who want a quiet, low-power storage solution with pre-installed solid-state drives.

Pros

• Comes with 16TB total capacity using two 8TB 2.5-inch SSDs
• Low energy consumption of 17.3 W during operation
• Btrfs file system with snapshot technology for data protection
• Compact white chassis design

Cons

• Only includes 1GB of DDR4 non-ECC memory
• Single 1GbE network port limits throughput
• 1.7GHz CPU speed is modest for heavy workloads

Good fit if

• You need fast storage speeds from 2.5-inch SSDs
• You want a quiet, low-power NAS for home use
• You prefer a system with pre-installed drives

Skip if

• You require 10GbE network connectivity
• You need more than 16TB of storage
• You plan to run memory-intensive virtual machines

Verdict: Synology DS223j 16TB 2.5-inch SSD NAS offers reliable speed and efficiency for small offices or home users who value SSD performance and low power usage over high-end networking or expandability.

6 Best premium

Asustor Lockerstor 16 Pro 16-Bay Rackmount NAS

Best for: High-density storage and 10GbE networking

Drive Bays

16-Bay

Network Connectivity

Dual 10GbE, Dual 1GbE

Processor

AMD Ryzen 7 Pro 7745

RAM Capacity

16GB ECC DDR5

Included Storage

Diskless

Form Factor

Rackmount

View on Amazon: Asustor Lockerstor 16 Pro 16-Bay Rackmount NAS Affiliate link

This 16-bay rackmount NAS features an AMD Ryzen 7 Pro 7745 8-core processor and 16 GB of ECC DDR5 memory. It includes dual 10GbE and dual Gigabit Ethernet ports. The unit supports PCIe 5.0 expansion and has redundant power supplies. It suits users needing high capacity and fast network connectivity for professional environments.

Pros

• 16-bay storage capacity
• AMD Ryzen 7 Pro 7745 8-core CPU
• Dual 10GbE and dual Gigabit Ethernet ports
• 16 GB ECC DDR5-4800 memory
• Dual redundant 80 PLUS Platinum power supplies

Cons

• 16-bay capacity may be excessive for small teams
• Dual 10GbE ports require compatible network infrastructure
• Heavy 33.7-pound build requires sturdy rack mounting

Good fit if

• You need maximum drive density in a single unit
• You require 10GbE network speeds for large files
• You want ECC memory for data integrity

Skip if

• You only have space for 2 to 4 drives
• Your network lacks 10GbE switches
• You prefer a compact desktop form factor

Verdict: Asustor 16-Bay Rackmount NAS delivers serious throughput and capacity for data-heavy workflows. It fits users who need enterprise-grade reliability and fast networking in a single chassis.

7 Best m.2 nvme

Synology DS723+ 2-Bay Ryzen NAS

Best for: High-capacity home servers with NVMe cache

Drive Bays

2-Bay

Network Connectivity

2 x 1GbE

Processor

Ryzen R1600 2.6GHz

RAM Capacity

32GB DDR4 ECC

M.2 NVMe Slots

1TB M.2 NVMe SSD

Included Storage

20TB HDD + 1TB SSD

View on Amazon: Synology DS723+ 2-Bay Ryzen NAS Affiliate link

The Synology DS723+ is a two-bay NAS built for heavy workloads. It features a Ryzen 2.6GHz CPU and 32GB of ECC memory. You get 20TB of storage and a 1TB M.2 NVMe SSD. It includes dual 1GbE ports for link aggregation. This setup suits users needing high capacity and fast cache.

Pros

• 32GB DDR4 ECC SODIMM memory
• 1TB M.2 NVMe SSD cache
• Dual 1GbE LAN ports
• Ryzen 2.6GHz CPU

Cons

• Only two drive bays
• 1GbE network speed limits
• Requires manual assembly

Good fit if

• You need high RAM for virtualization
• You want NVMe cache speed
• You prefer Synology DSM software

Skip if

• You require 10GbE connectivity
• You need more than two bays
• You want a pre-assembled unit

Verdict: Synology DS723+ 32GB RAM NVMe NAS offers robust specs for power users. It fits those who need ECC memory and NVMe storage in a compact form.

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