TERRAMASTER F4-425 4-Bay NAS Storage - Home 4K Media Server

Our review of the TERRAMASTER F4-425 finds a capable, home-focused 4-bay NAS that balances media playback, backup features, and quiet operation. For users who need a simple multimedia hub and reliable local storage, the F4-425 stands out because of its Intel x86 quad-core CPU, hardware 4K H.265 decoding, and a 2.5GbE port that makes large file transfers noticeably faster. It is diskless on delivery, so buyers should plan for drive purchases, but the unit is otherwise ready for Plex, Emby, or Jellyfin use and easy mobile setup via the TNAS app.

Key Features

• Intel x86 quad-core CPU: Provides enough compute for simultaneous tasks such as file serving, app hosting, and 4K transcoding without heavy lag on typical home networks.
• 4GB RAM: Enables smooth multitasking and media streaming for several users at once, helping Plex, Emby, and Jellyfin perform reliably.
• 2.5GbE LAN: Faster local transfers and improved multi-user access over gigabit networks, reducing bottlenecks when moving large video files.
• Hardware 4K H.265 decoding: Ensures smoother HD playback and offloads video work from client devices when streaming to compatible players.
• TNAS Mobile control: Lets owners initialize, manage backups, and sync photos and videos from a phone without needing a PC for setup.
• Quiet, tool-free design: Operates low noise levels around 21dB(A) and uses push-lock HDD trays for fast, tool-free drive installation.

Who It's For

The F4-425 is aimed at home users and small households that want a centralized multimedia server and dependable local storage for photos, videos, and documents. It suits families that stream 4K content to several devices, users who value quiet operation in bedrooms or small offices, and people who prefer mobile-first setup and backup workflows using the TNAS Mobile app.

It is less appropriate for enterprise deployments or heavy virtualization tasks that require ECC memory or large RAM capacities, and buyers who need a fully populated system should budget for up to four drives since the unit ships diskless.

Pros & Cons

Pros

• Good multimedia performance with hardware 4K H.265 decoding suitable for Plex, Emby, and Jellyfin.
• Fast 2.5GbE network port improves large file transfers and multi-user access compared with gigabit NAS devices.
• Quiet 21dB(A) operation and tool-free HDD trays make it easy to install and suitable for noise-sensitive locations.
• Comprehensive mobile features via TNAS Mobile for setup, backups, and sync without a PC.

Cons

• Ships diskless, so total cost depends on the drives purchased and capacity needed.
• 4GB RAM is adequate for home use but may limit heavier server-side apps or many concurrent containerized services.

Specifications

CPU	Intel x86 quad-core processor
Memory	4GB RAM
Bays	4-bay (diskless)
Network	2.5GbE LAN
Media decoding	Hardware 4K H.265 decoding
Max supported storage	Up to 120TB (4 x 30TB)
Noise level	Approximately 21dB(A)

Our Verdict

The TERRAMASTER F4-425 is a strong value for home multimedia and centralized backups, combining an x86 quad-core CPU, 4GB RAM, hardware 4K decoding, and a 2.5GbE port in a quiet, easy-to-use chassis. Buyers who need diskless flexibility and mobile-first management will find this NAS a practical choice for smooth streaming and faster local transfers, while those needing enterprise-grade memory or populated drives should consider other options.

Frequently Asked Questions

Does the F4-425 include hard drives?
The unit ships diskless, so you must purchase and install up to four compatible drives before use.

Can it stream 4K to Plex or Jellyfin?
Yes, the NAS supports hardware-level 4K H.265 decoding and is compatible with Plex, Emby, and Jellyfin for smooth playback.

How do I set up the NAS without a PC?
Use the TNAS Mobile app to initialize the F4-425, configure backups, and manage real-time sync and photo uploads directly from a smartphone.