Main trade-off
ASUSTOR Nimbustor 4 Gen2
The base memory may need an upgrade for many apps.
Head-to-head
ASUSTOR AS5404T vs ASUSTOR FS6706T: Flashstor excludes hard drives from the archive
The short answer
Choose AS5404T for large hard-drive capacity. Choose Flashstor 6 for six all-NVMe slots and no spinning drives.
Before you choose
The reasoning and the trade-offs
Main trade-off
ASUSTOR Flashstor 6
An all-NVMe pool uses six M.2 drives, so drive choice has a large effect on total capacity.
ASUSTOR Nimbustor 4 Gen2
- Choose it for
- Run Plex at home
- Transcode 4K video
- Main trade-off
- The base memory may need an upgrade for many apps.
ASUSTOR Flashstor 6
- Choose it for
- Build an all-SSD NAS
- Keep it small and quiet
- Main trade-off
- An all-NVMe pool uses six M.2 drives, so drive choice has a large effect on total capacity.
About this comparison
ASUSTOR AS5404T and ASUSTOR FS6706T compared by drive layout, network and processor, best use.
The practical choice turns on drive layout and network and processor, then on the constraints in your own setup.
Before you choose
How they fit your plans
Reusing a SATA archive requires a migration plan as well as bays
If the existing library lives on 3.5-inch SATA disks, AS5404T gives those drives a compatible physical form factor. Flashstor 6 requires M.2 NVMe storage, so its purchase includes different internal drives and somewhere to keep the original copy during migration. Choose AS5404T when reusing compatible SATA hardware matters. Choose Flashstor when you have budgeted the SSD set and a verified copy before repurposing old drives.
Facts behind this advice
AS5404T has four SATA bays and Flashstor 6 uses six M.2 NVMe slots. Physical compatibility alone does not mean an old NAS filesystem can be imported without formatting or that the existing array is directly portable.
A third attached archive changes the available USB speed
For an archive desk with a backup disk, a travel SSD and another external archive attached together, AS5404T offers three USB Gen2 sockets. Flashstor 6 has two Gen2 sockets plus two USB 2.0 ports, so all three devices can remain attached, but one uses the slower interface. Choose AS5404T when all three need Gen2 connections. Choose Flashstor if its SSD-only internal layout matters more and a slower third attachment is acceptable.
Facts behind this advice
This counts three Gen2 connections on AS5404T against two Gen2 and two USB 2.0 connections on FS6706T. It does not predict actual disk speed or promise simultaneous full-rate transfers. Rotate the fast connection if the third device needs it.
Winner by situation
Start with what you need it to do
Run Plex at home
For network and processor, ASUSTOR Nimbustor 4 Gen2 records “2.5 Gbps network. Plex use supported” and ASUSTOR Flashstor 6 records “2.5 Gbps network. Best treated as file storage”. This affects connection compatibility and available data paths. A higher label does not guarantee the same real-world result in every setup.
- ASUSTOR Nimbustor 4 Gen2
- Better fit
- ASUSTOR Flashstor 6
- Depends
Transcode 4K video
A hardware video engine matters when the NAS must convert compatible 4K files for remote viewers.
- ASUSTOR Nimbustor 4 Gen2
- Better fit
- ASUSTOR Flashstor 6
- Depends
Build an all-SSD NAS
An all-SSD NAS needs NVMe drives to serve as primary storage, not cache alone.
- ASUSTOR Nimbustor 4 Gen2
- Depends
- ASUSTOR Flashstor 6
- Better fit
Keep it small and quiet
A desk or living-room NAS benefits from a compact chassis and fewer moving parts.
- ASUSTOR Nimbustor 4 Gen2
- Depends
- ASUSTOR Flashstor 6
- Better fit
Start with four drives
For drive layout, ASUSTOR Nimbustor 4 Gen2 records “4 storage bays” and ASUSTOR Flashstor 6 records “6 storage bays”. This describes the working hardware or mechanism. The label alone does not prove faster or better results.
- ASUSTOR Nimbustor 4 Gen2
- Better fit
- ASUSTOR Flashstor 6
- Depends
Survive two drive failures
Tolerating two drive failures normally needs at least four bays and a double-parity layout.
- ASUSTOR Nimbustor 4 Gen2
- Better fit
- ASUSTOR Flashstor 6
- Depends
Choice A
ASUSTOR, AS5404T
ASUSTOR Nimbustor 4 Gen2
The chassis has 4-bay storage. Its fastest documented network path is 2.5 Gbps.
- Best matched use
- Run Plex at home
Checked facts
- Drive layout: 4 storage bays
- Network and processor: 2.5 Gbps network. Plex use supported
- Best use: run Plex at home and transcode 4K video
- AS5404T has four SATA drive bays.
Choice B
ASUSTOR, FS6706T
ASUSTOR Flashstor 6
The chassis has 6 primary M.2 NVMe storage slots. Its fastest documented network path is 2.5 Gbps.
- Best matched use
- Build an all-SSD NAS
Checked facts
- Drive layout: 6 storage bays
- Network and processor: 2.5 Gbps network. Best treated as file storage
- Best use: build an all-SSD NAS and keep it small and quiet
- FS6706T internal storage uses six M.2 NVMe slots.
Meaningful differences
What changes the fit
| What changes | ASUSTOR Nimbustor 4 Gen2 | ASUSTOR Flashstor 6 | Why it matters |
|---|---|---|---|
| Drive layout | 4 storage bays | 6 storage bays | This describes the working hardware or mechanism. The label alone does not prove faster or better results. |
| Network and processor | 2.5 Gbps network. Plex use supported | 2.5 Gbps network. Best treated as file storage | This affects connection compatibility and available data paths. A higher label does not guarantee the same real-world result in every setup. |
What you give up
Every choice has a cost
If you choose ASUSTOR Nimbustor 4 Gen2
- There is no native 10GbE port.
If you choose ASUSTOR Flashstor 6
- Dual 2.5GbE can bottleneck the six SSD slots.
What matters in practice
How to make the call
The useful difference
AS5404T has four SATA bays plus four M.2 slots.
What the numbers change
Flashstor 6 uses six M.2 NVMe slots as primary storage.
The trade-off
Both have dual 2.5GbE and HDMI.
What this comparison cannot tell you
- Drive compatibility changes over time.
- Real transfer speed depends on the full network and drive array.
- Plex behavior depends on the exact media format and client.
What the facts say
What the comparison shows
Useful conclusions from the current NAS devices comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| ASUSTOR Nimbustor 4 Gen2 |
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| ASUSTOR Flashstor 6 |
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Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
ASUSTOR Nimbustor 4 Gen2
Run Plex at home
See price & reviews on AmazonASUSTOR Flashstor 6
Build an all-SSD NAS
See price & reviews on AmazonLinks open in a new tab.