In modern homes, a NAS like the F4 425 Pro can be used to back up a family’s mobile photo albums and then use AI to automatically organize the photo content by time, faces and locations. It can support Dolby Vision and HDR hardware transcoding to create a private media library for a home cinema.TERRAMASTERData storage specialist TerraMaster has announced the global launch of its new four-bay flagship NAS device. The TerraMaster F4-425 Pro will be available from June 23, 2026, just in time to coincide with Amazon Prime Day.Powered by TOS 7, described as the world’s first AI-native operating system, the F4-425 Pro is private cloud storage solution that has natural language interaction with localized intelligent computing and enterprise-grade performance.The new F4-425 Pro has four drive bays for 3.5 or 2.5-inch HDDs and SSDs with a SATA interface. The HDDs can all be hot-swapped. There are also three separate bays for NVMe M.2 2280 SSDs with a capacity of 8TB for each bay which gives a total of 24TB. This means the NAS can be split into hot and cold storage zones. In total, the F4-425 Pro can hold up to a maximum of 120TB of data with the advantage of splitting storage across HDD and NVMe bays so that files for video editing or current projects can be stored on the ultra-fast SSDs, while archive files and backups can be stored on the HDDs.The new F4-425 Pro has four bays for 3.5 or 2.5-inch HDDs and SSDs with a SATA interface. The HDDs can all be hot-swapped. There are also three separate bays for NVMe M.2 2280 SSDs so the NAS can be split into hot and cold storage zones.TERRAMASTERMORE FOR YOU AI-Native Private WorkflowNetwork-attached storage devices are storage devices consisting of multiple drives on a computer network, that lets authorized users access data or upload new files. NAS has been around for a long time, but the sector is changing thanks to the power of AI. Devices like the new F4 425 Pro can function as an AI-native storage hub for a company or organization’s private workflows. The new NAS eliminates the manual setup process, which often involves typing obscure command-line interfaces. With the F4 425 Pro, users can carry out a full range of operations — from system configuration and storage administration to app deployment — simply by using natural language prompts.“TOS 7 stands as the industry’s first OS engineered for AI right at its core,” says TerraMaster’s product lead. “When paired with the F4 425 Pro, it empowers creators, small businesses and household users alike to own an intelligent, conversational data fortress that actively safeguards their critical files.”Powered by TOS 7, described as the world’s first AI-native operating system, the F4-425 Pro is private cloud storage solution that has natural language interaction with localized intelligent computing and enterprise-grade performance.TERRAMASTERHigh-Speed Core PerformanceThe F4 425 Pro is powered by an 8-core Intel processor and supports transfer speeds of up to 1,010 MB/s. The F4 425 Pro model with its Intel N350 processor and 16GB of DDR5 RAM has an ultra-low power draw of just 7W. The F4 425 Pro with the Intel N305 processor comes with 8GB DDR5 RAM and, like the N350 version, has dual 5GbE LAN ports. By using link aggregation, users can achieve combined throughputs of up to 1,010 MB/s, which is some 10 times faster than using standard gigabit Ethernet. So, what can users do with that kind of speed? The F4 425 Pro can handle native 4K/8K real-time video editing ove the network and it can host multi-user concurrent database with file access for dozens of users, as well as simultaneous operation of multiple virtual machines and Docker containers. The F4 425 Pro model has an Intel N350 processor, which has an ultra-low power draw of just 7W. The NAS also includes 8GB DDR5 RAM and dual 5GbE LAN ports. There are also USB ports for adding local direct storage.TERRAMASTERFirst AI-Native OSDeveloped with an AI-native design philosophy, the TOS 7 operating system that powers the F4 425 Pro has had its core system architecture extensively overhauled. It now boasts 500+ Modular RESTful APIs and, for the first time, the core low-level system interfaces are open for unrestricted access by AI agents and third-party developers.Thanks to Full-Spectrum Natural Language Control, the F4 425 Pro can support multi-turn conversations, ambiguous prompts and conditional automation rules using commands like: “Lock all shared folders immediately if ransomware is detected.”All AI processing is carried out locally and includes advanced features like facial recognition for photos, automated file sorting and semantic analysis, all run on the NAS hardware. This means that no data ever needs to leave the unit, eliminating a major risk of privacy leaks.The four bays on the F4 425 Pro can be filled with 3.5 or 2.5-inch HDDs and SDDs with SATA interfaces. The drives can be different sizess and are hot swappable. RAIDs can be set up too.TERRAMASTERDeveloper-First EcosystemAnother advantage of the new TOS 7 operating system is the soon-to-be-launched Developer-First Ecosystem that will include a dedicated Skill Marketplace paired with a full suite of developer tooling, which means third-party coders can build, test and publish their custom AI applications.TerraMaster claims that there are four game-changing features on the new F4 425 Pro that redefine how a NAS works. Firstly, it has Commands Through Conversation using OpenClaw AI Agent so that users can voice their requests. For example, users can ask the NAS to: “Create a 2TB shared folder for the design team and set up weekly automatic snapshots.” OpenClaw will then interpret and complete the tasks automatically without the need to memorize complex commands or the need to resort to complicated reference manuals. Secondly, thanks to the professional-grade 8-core architecture, the F4 425 Pro can handle concurrent workloads like 4K transcoding, virtual machine instances and Docker orchestration without any lag.The F4 425 Pro NAS can be used for just one content creator or a whole creative department of an SME.TERRAMASTERProactive BackupsThe third NAS advantage is proactive BBS backup. This offers data safeguards thanks to built-in real-time ransomware protection that uses HyperLock immutable WORM technology and an automated 3-2-1-0 backup framework. As soon as a suspicious file encryption is detected, the system instantly executes a three-tier defense protocol that locks target folders, quarantines relevant snapshots before sending instant alerts and then shifting backup from reactive storage to proactive threat immunity.Finally, the fast 1,010 MB/s throughput is designed to unleash creative content production with bonded dual 5GbE connectivity that’s enables smooth direct editing of raw 4K/8K footage offering the same kind of speed of a local drive, eliminating laborious file transfers and proxy rendering.AI power means also enables users to turn on dual 5GbE optimization using a single voice command. With the extra speed, users can work collaboratively with software like Final Cut Pro, Adobe Premiere Pro and DaVinci Resolve.AI processing is carried out locally and includes advanced features like facial recognition for photos, automated file sorting and semantic analysis, all run on the NAS hardware. This means that no data ever needs to leave the unit, eliminating a major risk of privacy leaks.TERRAMASTERDesigned For GrowthTerraMaster says the F4 425 Pro is designed for growing businesses, but it’s simple enough to be administered by a single IT administrator deploying permission templates and batch backups for more than 50 computers, all while monitoring the overall security setup using the BBS central console. Everything can be done using natural language instead of obscure line commands.Other uses for this next-generation NAS device include the ability for developers to trigger a fully automated Git Pull → Build → Deploy CI/CD pipeline via OpenClaw, compatible with GitLab Runner and Jenkins and supporting Ubuntu/Debian virtual machines.In modern homes, a NAS like the F4 425 Pro can be used to back up a family’s mobile photo albums and then use AI to organize the photo content by time, faces and locations. It supports Dolby Vision and HDR hardware transcoding, enabling the creation of a private media library for a home cinema.As well as the four drive bays, the F4 425 Pro has three internal bays for M.2 2280 NVMe SSDs for superfast storage as RAID or separate volumes.TERRAMASTERScalable Storage And ExpansionLike all NAS devices, the F4 425 Pro can be set up as a RAID or separate storage. Using TRAID Flexible RAID, the F4 425 Pro supports the mixing of hard drives of different capacities. Users can expand their storage online without migrating data to maximize available space. With TerraSync Cross-Platform Sync, it’s possible to have millisecond-level, real-time synchronization across NAS, PC, Mac and mobile devices, all with version history traceability.Other features include Hybrid Cloud Storage Backup, which supports two-way synchronization with major cloud storage services like OneDrive, Google Drive and Dropbox. There’s also Docker and Virtual Machines support with pre-installed containers and virtualization for easy expansion of unlimited applications.Pricing and Availability:TerraMaster says that discounts of up to 25% will be available across the company’s entire product line during Amazon Prime, including NAS, DAS and more. The F4-425 Pro with Intel N350 processor is priced at $799.99 / £729.99 / €839.99. There is also a version of the F4-425 Pro with Intel N305 processor and that model is priced at $699.99 / £639.99 / €739.99. As well as Amazon, the F4-425 Pro is available from the TerraMaster Official Store, Amazon Worldwide, AliExpress, Newegg, Walmart and B&H.Tech Specs:Processor model: Intel N350 and N305. Processor architecture: X.86 64-bit. Processor frequency: Max burst up to 3.9GHzHardware transcoding engine: H.264, H.265, MPEG-4, VC-1; maximum resolution: 4K (4096 x 2160); maximum frame rate per second (FPS): 60. Pre-installed memory module: 16GB (N350) / 8GB (N305). Memory slots: 1 x non-ECC SODIMM. Maximum supported memory: 32GB. Disk bays: 4 x HDD. Compatible drive types: 3.5" SATA HDD, 2.5" SATA HDD, 2.5" SATA SSD. Maximum internal storage capacity: 120TB (30TB x4) (Capacity may vary by RAID types). M.2 2280 NVMe bays: 3 PCIe 3.0 to max of 8TB per bay to a maximum of 24TB.Drive hot swap: Yes. Internal drive: Btrfs, EXT4. External drive: EXT3, EXT4, NTFS, FAT32, HFS+, BTRFS.RJ-45 5GbE network ports: x 2. USB 3.2 host port Type A: x3 (10Gbps).USB 3.2 host port Type C: x1 (10Gbps).HDMI: x 1. Dimensions: (HxWxD): 150 x 181 x 219mm.Weight: 2.9kg. System fan: 1 x 120 x 120 x 25mm.Fan mode: Smart, High speed, Middle speed, Low speed. Noise level: 20.9 dB(A) with 4 SATA HDDs/SSDs in standby mode. Power supply: 90W. AC power input: 100V – 240V AC, 50/60 Hz.