Name: TERRAMASTER TERRAMASTER F4-425 Pro NAS 4-Bay, Intel N350 8-Core, 16GB DDR5 (Diskless) | 5GbE LAN x 2, M.2 Slot x 3, AI-Native OS TOS 7, OpenClaw Supported, Network Attached Storage for Multimedia and VM (Diskless)
Brand: TERRAMASTER
Price: 679.99 USD
Availability: InStock

Directory/NAS / Storage/TERRAMASTER F4-425 Pro NAS 4-Bay, Intel N350 8-Core, 16GB DDR5 (Diskless) | 5GbE LAN x 2, M.2 Slot x 3, AI-Native OS TOS 7, OpenClaw Supported, Network Attached Storage for Multimedia and VM (Diskless)

The breakdown

4 axes, scored the same way across every nas / storage we log.

Performance Truth8.5

Reliability6.0

Software & Ecosystem6.5

Price Honesty9.0

Spec, translated

The dual 5GbE ports mean this NAS can theoretically transfer data at up to 1020MB/s, fast enough for multiple users to edit 4K video directly from the device, provided your entire network is also multi-gigabit.

Lab notes

The observations that actually change the buying decision.

The hardware combination for $680 is exceptionally strong: an 8-core CPU, 16GB of DDR5 RAM, and three M.2 NVMe slots are specs usually found in more expensive units.

Dual 5GbE networking is the standout feature, offering a potential 10Gbps aggregated link that dwarfs the 1GbE or 2.5GbE common at this price, though it requires a compatible network to utilize.

TerraMaster's primary weakness has historically been its software (TOS); you are betting that this new AI-infused version overcomes years of trailing competitors like Synology and QNAP.

The specified 'Intel N350' CPU does not exist in Intel's catalog; this is likely a typo for the capable 8-core Intel Processor N305, but such errors on spec sheets erode confidence.

Why you should buy

This is for the user who prioritizes hardware performance-per-dollar above all else. If you are comfortable with a less mature OS and want powerful specs for virtualization, fast file transfers, or a high-performance Plex server, the value is undeniable.

Why you should skip

First-time NAS users should avoid this. The polished, user-friendly experience of a Synology DSM is a better starting point. Anyone who requires absolute, set-it-and-forget-it stability should also look elsewhere.

What buyers actually say

Themes pulled from real owner reviews, not marketing copy.

Pros

Exceptional CPU and RAM for the price point.
Dual 5GbE ports offer pro-level network speed.
Three dedicated M.2 NVMe slots for caching.
Powerful enough for robust 4K media transcoding.
Very aggressively priced against comparable hardware.

Cons

Software ecosystem is less mature than rivals.
Brand's long-term reliability is not as established.
New 'AI' OS features are unproven.
Full network speed requires expensive infrastructure.
Typo in CPU specification on some listings.

Full specifications

Source: manufacturer + retail catalog · synced today.