TerraMaster F4-425 4-Bay NAS Review — Is It Worth It? [2026]
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TerraMaster F4-425 4-Bay Home NAS
The entry point to TerraMaster's newer F4 line: a quad-core Celeron, 4GB of DDR4, a single 2.5GbE port and four bays for up to 120TB of raw storage.
Is the TerraMaster F4-425 worth buying?
For a home or small-office media and backup server, yes, provided you can live with one network port. At $364.99 you get four bays, an Intel Celeron N5095 quad-core with 4K hardware transcoding and 2.5GbE, which is enough for Plex-style streaming, photo backup and file sharing. It is not the box for heavy virtualization or for anyone who wants link aggregation. One of the five reviewers was unhappy with performance during a large initial data copy and pointed at the single network interface.
A straightforward four-bay box with sane hardware
The F4-425 uses an Intel Celeron N5095 (quad core, 2.0 GHz, bursting to 2.9 GHz) with 4GB of DDR4 SODIMM in a single slot that officially goes to 16GB. It has three USB 3.2 host ports (two at 10 Gbps, one at 5 Gbps) and an HDMI output. TerraMaster's own TOS operating system runs on top, with support for Docker and virtualization, CloudSync to Google Drive, OneDrive and Dropbox, and up to 50 user accounts.
What makes it stand out
4K hardware transcoding
The N5095 has a hardware transcoding engine for H.264 and H.265 up to 4K at 60 fps, which is what makes Plex, Emby and Jellyfin streaming smooth on modest hardware. That is the main reason to pick an Intel-based NAS over an ARM one.
TRAID and up to 120TB
Four bays take 3.5-inch and 2.5-inch SATA drives, with a listed maximum of 120TB (4 x 30TB). TerraMaster's TRAID and TRAID+ arrays claim up to 30 percent more usable space than traditional RAID when you mix drive sizes. Drive migration is supported, and one reviewer swapped disks from a failed F4-423 into this unit without data loss.
21 dB(A) and tool-free trays
TerraMaster rates it at 21 dB(A), measured with two drives in standby in a 17.3 dB room at 1 meter, so it will be louder under load. The Push-Lock trays let you install drives without a screwdriver.
Full spec sheet
| Processor | Intel Celeron N5095, 4 cores, 2.0 GHz (2.9 GHz burst) |
| Memory | 4GB DDR4 SODIMM (1 slot, max 16GB) |
| Drive bays | 4 x 3.5"/2.5" SATA HDD or 2.5" SSD |
| Max raw capacity | 120TB (4 x 30TB) |
| Network | 1 x 2.5GbE RJ-45 |
| USB | 2 x USB 3.2 (10 Gbps) + 1 x USB 3.2 (5 Gbps) |
| Video out | 1 x HDMI |
| Transcoding | H.264 / H.265, up to 4K at 60 fps |
| Size (H x W x D) | 222 x 179 x 154 mm |
| Weight | 2.1 kg net |
| Noise | 21.0 dB(A), 2 drives standby |
| Power supply | 90 W |
| Warranty | 2 years |
Pros & Cons
Pros
- Hardware 4K transcoding on a $364.99 NAS
- Four bays and up to 120TB with flexible TRAID arrays
- Tool-free trays, hot-swap drives and simple drive migration
- Quiet at low load, with a measured 21 dB(A) rating
- Docker and virtualization support in TOS
Cons
- Only one network port, and only 2.5GbE
- 4GB of RAM stock; you will want to upgrade for Docker use
- No M.2 slots for caching or SSD volumes
- Only 5 reviews on the page, one lukewarm
- The noise rating is measured in idle-ish conditions
Answers before you buy
What CPU does the F4-425 use?
Can I upgrade the RAM?
Is 2.5GbE enough?
Does it have M.2 slots?
What is the warranty?
The sensible budget four-bay
If you want a simple, quiet four-bay NAS for media and backups, the F4-425 hits the right notes for the price. Go up to the Plus if you need faster networking and NVMe slots, and stay here if you don't.
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