6 Best Alternatives to the Asustor Flashstor 12-Bay NVMe NAS (2026)
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You might look for asustor flashstor 12 pro fs6712x alternatives if you need a different form factor or connectivity level. The original Flashstor 12 Pro is a dedicated all-flash NAS with twelve M.2 NVMe slots, an Intel Celeron N5105 processor, and 2.5 Gigabit Ethernet. It targets content creators who require high-speed solid-state storage in a compact desktop chassis. However, its exclusive use of NVMe drives and limited network ports may not suit every workflow. Some users prefer hybrid SATA storage, rackmount designs, or higher bandwidth connections like 5GbE.
The 6 options listed here were chosen because their specifications overlap with the original. This list includes other 12-bay units, such as the Asustor Lockerstor 12-Bay Rackmount NAS and Synology 12-Bay models, which offer varying RAM capacities and drive types. You will also find smaller 4-bay and 6-bay options for those who need less density. Each alternative provides distinct hardware configurations, allowing you to match your specific capacity, processing, or expansion needs without being locked into an all-flash architecture.
Our top pick: Asustor Flashstor 12-Bay NVMe NAS.
How these options differ
Asustor Lockerstor 6-Bay NAS with Dual 5GbE
The Asustor Lockerstor 6-Bay NAS offers a hybrid approach, combining four M.2 NVMe slots with two SATA drive bays. Unlike the all-flash Flashstor 12 Pro, this model lets you mix high-speed solid-state drives with larger, cost-effective mechanical disks. It features dual 5GbE ports, providing faster network throughput than the original’s single 2.5GbE connection. You gain flexibility in storage tiers but sacrifice the pure NVMe density and compact form factor of the Flashstor. This unit suits users who need rapid access for active projects while archiving older files on bulk SATA drives.
QNAP TS-431K 4-Bay NAS
The QNAP TS-431K is a compact 4-Bay NAS designed for basic home office tasks. It uses standard SATA drives rather than NVMe slots, making it a budget-friendly option for users who do not require the extreme speeds of all-flash storage. Its 1GbE network connection is significantly slower than the Flashstor’s 2.5GbE ports, limiting its suitability for large media files or high-performance workflows. This device is smaller and lighter, fitting easily into small spaces. It is a practical choice for simple file sharing and backup needs where speed and capacity expansion are not primary concerns.
Asustor Lockerstor 12-Bay Rackmount NAS
The Asustor Lockerstor 12-Bay Rackmount NAS provides a server-grade alternative with a chassis designed for rack installation. It features 5GbE and 2.5GbE connectivity options, offering more network flexibility than the Flashstor’s single 2.5GbE port. With 8GB of RAM, it handles more concurrent tasks and virtualization workloads than the Flashstor’s 4GB. This model is larger and heavier, intended for data centers or dedicated server rooms rather than desktop use. It is ideal for professionals who need dense storage in a rackmount format with enhanced networking and memory capacity for enterprise applications.
Synology 12-Bay DiskStation Expansion Unit
The Synology DX1215II is an expansion unit, not a standalone NAS. It provides 12 additional SATA drive bays to increase the capacity of compatible Synology DiskStation models. Unlike the Flashstor 12 Pro, it does not have its own processor or independent network connectivity. You must already own a Synology server to use this device. It is best for users who need massive bulk storage for archives or backups and already have a capable NAS core. It offers no performance boost for active editing workflows, serving purely as a capacity extension for existing systems.
Synology 12-Bay Quad-Core NAS
The Synology DS2422+ is a 12-Bay NAS that supports both SATA drives and optional NVMe caching. It features a quad-core processor and 4GB of RAM, similar to the Flashstor, but allows for memory upgrades up to 32GB. This NAS offers greater expansion potential, supporting up to 24 bays with additional enclosures. It uses SATA drives as primary storage, differing from the Flashstor’s all-NVMe design. This model suits users who need scalable capacity and the ability to add fast SSD caching for improved performance, rather than relying entirely on expensive NVMe drives for all storage needs.
Synology 12-Bay Xeon Desktop Enclosure
The Synology DS3622xs+ is a high-performance 12-Bay NAS with 16GB of base RAM and a Xeon processor. It is built for virtualization and demanding multi-bay expansion setups. With 16GB of RAM, it handles significantly more concurrent tasks and virtual machines than the Flashstor’s 4GB. It supports expansion up to 36 bays, offering much greater scalability. This unit is larger and designed for enterprise environments. It is the best choice for users requiring heavy compute power and large-scale data management, rather than the focused all-flash speed of the Flashstor for content creation.
Quick picks
Our 7 picks
Asustor Flashstor 12-Bay NVMe NAS
Best for: all-flash M.2 NVMe content creation storage
- Drive Bays
- 12-Bay
- Network Connectivity
- 10GbE, 2.5GbE
- Processor
- Intel Celeron N5105
- RAM Capacity
- 4GB DDR4-2933
- M.2 NVMe Slots
- 12 slots
- Included Storage
- Diskless
The Asustor Flashstor 12-Bay All-Flash NVMe NAS provides high-density solid-state network storage in a compact chassis. You get twelve M.2 NVMe slots powered by an Intel Celeron N5105 quad-core processor and 4GB of DDR4-2933 memory. It includes 2.5 Gigabit Ethernet ports and two USB 3.2 Gen 2x1 connections. This setup suits you if you need fast local storage for content creation workflows without mechanical hard drives.
Pros
- Twelve M.2 NVMe solid-state drive slots
- Intel Celeron N5105 quad-core processor
- Equipped with 2.5 Gigabit Ethernet connectivity
- Two USB 3.2 Gen 2x1 ports
Cons
- No standard 3.5-inch or 2.5-inch SATA drive bays
- Base configuration includes 4GB of memory
Good fit if
- You need an all-flash network enclosure with twelve M.2 NVMe slots.
- You require 2.5 Gigabit Ethernet connectivity for content creation tasks.
Skip if
- You plan to install standard 3.5-inch mechanical hard drives.
- You require more than 4GB of preinstalled system memory out of the box.
Verdict: Asustor Flashstor 12-Bay All-Flash NVMe NAS delivers dedicated solid-state storage backed by an Intel quad-core processor and 2.5GbE networking. It functions as a compact all-flash solution when you need twelve M.2 slots for high-speed file access.
Asustor Lockerstor 6-Bay NAS with Dual 5GbE
Best for: hybrid SATA storage with four NVMe slots
- Drive Bays
- 6-Bay
- Network Connectivity
- 2 x 5GbE
- Processor
- Intel Celeron N5105
- RAM Capacity
- 8GB DDR4
- M.2 NVMe Slots
- 4 slots
- Included Storage
- Diskless
This 6-bay hybrid network-attached storage unit balances high-capacity SATA drives with flash caching. You get an Intel Celeron N5105 quad-core processor, 8GB of DDR4 memory, four dedicated M.2 NVMe slots, and dual 5GbE Ethernet ports out of the box. It suits you if you need bulk mechanical drive storage alongside fast NVMe cache tiers for 4K video editing, local backups, and team file sharing across your studio network.
Pros
- Four M.2 NVMe slots for cache or fast storage pools
- Dual 5GbE network ports with link aggregation support
- Pre-installed 8GB DDR4 RAM for multitasking
- Six hybrid drive bays accepting SATA hard drives and SSDs
Cons
- Requires an expansion card to achieve 10GbE network speeds
- Provides fewer total NVMe slots than all-flash enclosures
Good fit if
- You need bulk SATA drive capacity paired with four M.2 NVMe slots.
- You use a 5GbE local network for content creation workflows.
- You want 8GB pre-installed memory and 4K media transcoding capability.
Skip if
- You require built-in 10GbE networking without using an expansion slot.
- You want an all-flash system holding more than four NVMe drives.
Verdict: Asustor Lockerstor 6-Bay NVMe Hybrid NAS delivers a practical middle ground between bulk SATA capacity and high-speed NVMe caching. It provides 5GbE connectivity and four M.2 slots without forcing you into an exclusively flash-based workflow.
QNAP TS-431K 4-Bay NAS
Best for: small home offices with basic storage needs
- Drive Bays
- 4 Bay
- Network Connectivity
- 2 x 1 GbE
- Processor
- Annapurna Labs AL-214
- RAM Capacity
- 1GB DDR3
- Included Storage
- Diskless
- Dimensions
- 6.3 × 8.62 × 6.3 inches
The QNAP TS-431K is a 4-bay NAS designed for home use. It features an Annapurna Labs quad-core 1.7 GHz processor and 1GB of DDR3 RAM. You get two 1GbE ports for network connectivity and three USB 3.2 Gen 1 ports for external storage. This diskless unit supports 3.5-inch SATA drives. It suits users needing a compact, entry-level storage solution with basic performance.
Pros
- Annapurna Labs AL-214 quad-core 1.7 GHz processor
- Two 1GbE network ports
- Three USB 3.2 Gen 1 ports
- Compact 4-bay design
Cons
- Only 1GB of DDR3 RAM limits multitasking
- 1GbE ports are slower than the 2.5GbE or 10GbE options in larger NAS units
- Diskless design requires you to purchase drives separately
Good fit if
- You need a small, entry-level NAS for home media storage
- You want a quad-core processor for basic file management tasks
- You require multiple USB ports for backup drives
Skip if
- You need high-speed 2.5GbE or 10GbE network connectivity
- You require more than four drive bays
- You need substantial RAM for virtualization or heavy multitasking
Verdict: The QNAP TS-431K 4-Bay Home NAS fits users who need a compact, affordable storage solution for basic home tasks. It is not suitable for those requiring high-speed networking or large capacity expansions.
Asustor Lockerstor 12-Bay Rackmount NAS
Best for: 12-bay rackmount server storage
- Drive Bays
- 12 Bay
- Processor
- Intel Atom C3538
- RAM Capacity
- 8 GB DDR4-2133
- Included Storage
- Diskless
- Form Factor
- Rackmount
- Network Connectivity
- 5GbE, 2.5GbE
This 12-bay rackmount NAS uses an Intel Atom C3538 quad-core CPU and includes 8 GB of DDR4 RAM. It features two Gigabit and two 2.5-Gigabit Ethernet ports, supporting link aggregation for up to 5 Gbps. The unit supports virtualization and Docker. It suits users needing high-density storage in a server room. You get expandable memory up to 128 GB and PCIe expansion for faster networking.
Pros
- 12-bay drive capacity for high-density storage
- Intel Atom C3538 quad-core processor
- 8 GB DDR4 RAM expandable to 128 GB
- 2.5GbE and Gigabit Ethernet with aggregation
Cons
- 2U rackmount form factor requires server space
- No included storage drives
- Heavier build at 25.8 pounds
Good fit if
- You need a 12-bay chassis for a data center
- You require 2.5GbE network speeds
- You plan to run virtual machines or Docker
Skip if
- You prefer a desktop tower design
- You need pre-installed hard drives
- You want a compact 1U rack unit
Verdict: Asustor 12-Bay Rackmount NAS offers robust specs for server environments. It fits users who need dense storage and network flexibility in a rackmount chassis.
Synology 12-Bay DiskStation Expansion Unit
Best for: expanding compatible Synology DiskStation storage capacity
- Drive Bays
- 12-Bay
- Included Storage
- Diskless
- Dimensions
- 18.5 × 17.1 × 16.5 inches
- Weight
- 19.9 pounds
This 12-bay expansion unit connects directly to your existing Synology DiskStation setup. You get 12 extra drive bays designed for plug-and-play storage growth with Synology HAT5300 SATA hard drives. It arrives diskless, weighs 19.9 pounds, and measures 17.1 by 16.5 by 18.5 inches. It suits you if your primary host system needs drive expansion backed by Synology's 5-year limited warranty.
Pros
- Adds 12 drive bays to a Synology DiskStation
- Plug-and-play setup for storage expansion
- Verified compatibility with Synology HAT5300 SATA HDDs
- Backed by a 5-year limited warranty
Cons
- Requires a separate Synology DiskStation host unit
- Ships diskless without pre-installed storage drives
- Weighs 19.9 pounds before installing drives
Good fit if
- You already own a compatible Synology DiskStation needing additional storage bays.
- You plan to populate the chassis with Synology HAT5300 SATA hard drives.
- You want hardware covered by a 5-year limited warranty.
Skip if
- You need a standalone NAS unit that operates without a base DiskStation.
- You want an all-flash NVMe enclosure instead of 12 SATA drive bays.
Verdict: Synology 12-Bay Expansion Unit expands your existing DiskStation capacity with 12 plug-and-play SATA drive bays. It delivers large-scale storage growth under a 5-year limited warranty without functioning as a standalone server.
Synology 12-Bay Quad-Core NAS
Best for: large-capacity storage with 24-bay expansion potential
- Drive Bays
- 12-Bay
- Processor
- Quad Core
- RAM Capacity
- 4GB DDR4
- Included Storage
- Diskless
- Dimensions
- 18.5 × 17 × 16.5 inches
- Weight
- 20.9 pounds
This Synology 12-bay NAS provides high-capacity network storage powered by a quad-core processor and 4GB of DDR4 memory. It reaches sequential speeds up to 2,201 MB/s read and 1,383 MB/s write. You can expand the memory up to 32 GB or scale out to 24 bays using a DX1222 expansion unit. It suits you if you need a high-bay central storage hub with clear upgrade paths for networking, caching, and drive capacity.
Pros
- Delivers up to 2,201 MB/s read and 1,383 MB/s sequential write performance
- Expandable to 24 drive bays with a DX1222 expansion unit
- Supports upgrades to 32 GB memory, 10/25GbE networking, and NVMe SSD caching
- Backed by a 3-year warranty
Cons
- Comes standard with only 4GB of memory
- Requires add-on modules for 10/25GbE networking or NVMe SSD cache
- Heavy 20.9-pound desktop footprint
Good fit if
- You need a 12-bay enclosure with the option to expand to 24 bays.
- You want sequential read throughput reaching up to 2,201 MB/s.
- You plan to upgrade system memory up to 32 GB over time.
Skip if
- You require built-in 10/25GbE networking straight out of the box.
- You want integrated NVMe SSD slots without buying expansion cards.
Verdict: Synology 12-Bay Quad-Core NAS delivers scalable 12-bay network storage with fast sequential throughput and optional memory upgrades up to 32 GB. It gives you flexible hardware expansion paths for added drives, faster network speeds, and NVMe SSD caching.
Synology 12-Bay Xeon Desktop Enclosure
Best for: virtualization and demanding multi-bay expansion setups
- Drive Bays
- 12-Bay
- Processor
- 6-core Intel Xeon
- Included Storage
- Diskless
- RAM Capacity
- 16GB RAM
- Dimensions
- 17 × 18.3 × 17 inches
- Weight
- 21.6 pounds
This 12-bay desktop unit gives you an enterprise 6-core Intel Xeon processor and 16GB of built-in system memory. You can scale storage to 36 drive bays using two DX1222 expansion units or increase memory up to 48GB. It supports 10GbE or 25GbE networking, Fibre Channel, and NVMe SSD caching. It suits you if you need heavy virtualization, large backup tasks, and high-bandwidth processing in a traditional form factor.
Pros
- 6-core Intel Xeon processor
- 16GB system memory expandable up to 48GB
- Scales up to 36 drive bays with two DX1222 units
- Supports 10/25GbE networking and NVMe SSD cache
- 5-year warranty included
Cons
- Ships diskless with no pre-installed storage drives
- Heavy 21.6-pound desktop footprint
Good fit if
- You need 16GB RAM and a 6-core Xeon CPU for hosting virtual machines.
- You plan to scale out storage across up to 36 total drive bays.
Skip if
- You need an ultra-compact enclosure rather than a 21.6-pound tower.
- You want a turnkey NAS supplied with factory-installed drives.
Verdict: Synology 12-Bay 16GB RAM Xeon NAS delivers strong processing throughput with 16GB base memory and expansion capacity up to 36 bays. It is built for compute-intensive virtualization and large backup pools.
Specifications side by side
| Spec | Asustor Flashstor 12-Bay NVMe NAS | Asustor Lockerstor 6-Bay NAS with Dual 5GbE | QNAP TS-431K 4-Bay NAS | Asustor Lockerstor 12-Bay Rackmount NAS | Synology 12-Bay DiskStation Expansion Unit | Synology 12-Bay Quad-Core NAS | Synology 12-Bay Xeon Desktop Enclosure |
|---|---|---|---|---|---|---|---|
| Drive Bays | 12-Bay | 6-Bay | 4 Bay | 12 Bay | 12-Bay | 12-Bay | 12-Bay |
| Network Connectivity | 10GbE, 2.5GbE | 2 x 5GbE | 2 x 1 GbE | not specified | not specified | not specified | not specified |
| Processor | Intel Celeron N5105 | Intel Celeron N5105 | Annapurna Labs AL-214 | Intel Atom C3538 | not specified | Quad Core | 6-core Intel Xeon |
| RAM Capacity | 4GB DDR4-2933 | 8GB DDR4 | 1GB DDR3 | 8 GB DDR4-2133 | not specified | 4GB DDR4 | not specified |
| M.2 NVMe Slots | 12 slots | 4 slots | not specified | not specified | not specified | not specified | not specified |
| Included Storage | Diskless | Diskless | Diskless | Diskless | Diskless | Diskless | Diskless |
| Form Factor | not specified | not specified | not specified | Rackmount | not specified | not specified | not specified |
| Hardware Interface | M.2 NVMe, HDMI | M.2 NVMe, HDMI | not specified | not specified | not specified | not specified | not specified |
| Number of Bays | 12-Bay | 6-Bay | 4-Bay | 12-Bay | 12-Bay | 12-Bay | 12-Bay |
| Target Audience | Content Creators | Content Creators | not specified | not specified | not specified | not specified | not specified |
| Processor Cores | Quad-Core | Quad-Core | not specified | Quad-Core | not specified | Quad-Core | not specified |
| Dimensions | 7.6 × 12.1 × 1.89 inches | 13 × 12 × 13 inches | 6.3 × 8.62 × 6.3 inches | 21.1 × 17.3 × 3.46 inches | 18.5 × 17.1 × 16.5 inches | 18.5 × 17 × 16.5 inches | 17 × 18.3 × 17 inches |
| Weight | 3.02 pounds | 9.7 pounds | 4.4 pounds | 25.8 pounds | 19.9 pounds | 20.9 pounds | 21.6 pounds |
| Size | 12 Bay | 6 Bay | NAS | 5.5"(W) x 7.5"(H) x 9.1"(D) | 270 mm x 300 mm x 340 mm | 12-bay; 4GB DDR4 | DS3622xs+ |
| Color | neutral | Black | White | AS6512RD | Black | Black | Black |
| Model | 110565 | AS6706T v2 | TS-431K | AS6512RD | DX1215II | DS2422+ | DS3622xs+ |
If you want other compact storage setups, you can compare serenelife 12 alternatives for different hardware layouts.
Frequently asked questions
What is the best alternative to the Asustor Flashstor 12-Bay for content creators?
The Asustor Lockerstor 6-Bay NAS serves as a strong alternative for hybrid workflows. It provides four M.2 NVMe slots alongside two SATA bays. This setup balances high-speed solid-state performance with larger mechanical drive capacity. You get dual 5GbE connectivity for faster network transfers. It avoids the exclusive all-flash constraint of the Flashstor while maintaining professional-grade speed.
Which 12-bay NAS offers the most RAM for virtualization tasks?
The Synology 12-Bay Xeon Desktop Enclosure is the top choice for memory-intensive workloads. It comes with 16GB of base RAM and supports expansion up to 36 bays. The Xeon processor handles compute-heavy virtualization efficiently. This model is designed for demanding multi-bay expansion setups and large backup pools where processing power and memory are critical for stability.
Can I expand my Synology storage capacity without buying a new NAS?
Yes, the Synology 12-Bay DiskStation Expansion Unit allows you to add capacity to existing systems. It provides twelve plug-and-play SATA drive bays. This unit does not function as a standalone server but expands your current DiskStation storage. It is ideal for users needing large-scale storage growth under a 5-year limited warranty without replacing their primary hardware.
Is there a rackmount option for 12-bay server storage needs?
The Asustor Lockerstor 12-Bay Rackmount NAS fits users requiring dense storage in a server environment. It features a quad-core processor and supports both 5GbE and 2.5GbE networking. The chassis is designed for rack installation, offering robust specs for professional server setups. It provides network flexibility and high density for users who need enterprise-grade physical form factors.
What is a budget-friendly 4-bay NAS for home offices?
The QNAP TS-431K 4-Bay NAS is a compact solution for basic home tasks. It fits users needing affordable storage without requiring high-speed networking or massive capacity. The device features 1GbE connectivity and a small footprint. It is not suitable for heavy workloads but serves well for small home offices with simple file sharing and backup needs.
Which Synology model allows memory upgrades up to 32 GB?
The Synology 12-Bay Quad-Core NAS supports optional memory upgrades up to 32 GB. It starts with 4GB of DDR4 RAM and offers flexible hardware expansion paths. You can add faster network speeds and NVMe SSD caching to this system. It provides scalable 12-bay network storage with fast sequential throughput for users needing future-proof hardware capabilities.