Technical reference
TerraMaster F4-425 Pro N305 specifications
F4-425 Pro N305; factory 8 GB non-ECC SODIMM; four SATA bays and three M.2 slots; dual 5GbE.
Complete specifications with requirements, upgrade limits and sources. For our buying judgment, reviews and prices, return to the buying guide.
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Search all 68 specifications, including conditions and limits.
Identity
Compute and memory
Official specifications and applicable conditions.
| Processor | Intel Core i3-N305 · 8-core[1] |
|---|---|
| Factory memory | 8 GB non-ECC SODIMM; one slot, max 32 GB[1] Current official table explicitly separates N350 and N305; relevant shared chassis rows apply to both. |
| Physical CPU cores | 8[4][2] |
| Factory memory | 8 GB non-ECC SODIMM; one slot, max 32 GB[1] Current official table explicitly separates N350 and N305; relevant shared chassis rows apply to both. |
| Host memory ECC | No[1] Current official table explicitly separates N350 and N305; relevant shared chassis rows apply to both. |
| Official memory upgrade path | Replace the single SODIMM; maximum 32 GB[1] Current official table explicitly separates N350 and N305; relevant shared chassis rows apply to both. |
| Official memory limit | 32 GB non-ECC SODIMM[1] Current official table explicitly separates N350 and N305; relevant shared chassis rows apply to both. |
Storage and expansion
Official specifications and applicable conditions.
| Cataloged drive-bay count | 4[1] M.2 positions are listed separately and are not silently added to SATA bay count. |
|---|---|
| Supported drive layout | 3.5-inch SATA HDD / 2.5-inch SATA SSD / M.2 NVMe[1] |
| Replaceable storage drives | Yes[2] |
| M.2 expansion | Yes[2] |
| Official external drive enclosure expansion | Not verified[1] F4-425 Pro N305: evidence is still needed for an official external drive-enclosure expansion path; a USB port alone does not establish support. This remains unknown, not a confirmed no. |
| Physical M.2 slots | 3[2] |
| SATA without a mandatory model whitelist | Not verified[1] F4-425 Pro N305: evidence is still needed for the documented boundary of any mandatory manufacturer-model whitelist for SATA media; a compatibility list alone does not establish a technical lock. This remains unknown, not a confirmed no. |
| M.2 without a mandatory model whitelist | Not verified[1] F4-425 Pro N305: evidence is still needed for the documented boundary of any mandatory manufacturer-model whitelist for M.2 media; an omitted restriction does not establish unrestricted support. This remains unknown, not a confirmed no. |
Network
Official specifications and applicable conditions.
| Installed Ethernet | 2 × 5GbE[1] Multiple ports do not guarantee one client the sum of their link rates. |
|---|---|
| Fastest installed single network port | 5 Gbps[2] |
| Official network upgrade path | Dual 5GbE installed; no verified official faster-NIC upgrade path[1] Current official table explicitly separates N350 and N305; relevant shared chassis rows apply to both. |
Software and data protection
Official specifications and applicable conditions.
| Factory operating system | TOS 7 advertised and used in the N305 review; exact shipping build not verified[1] Current official table explicitly separates N350 and N305; relevant shared chassis rows apply to both. |
|---|---|
| Published storage and protection features | TRAID elastic storage; snapshot recovery; automated 3-2-1 backup; HyperLock WORM[1] These are current manufacturer claims on the exact shared variant page. Package, media, retention and administrator-control prerequisites must still be verified for the selected configuration. |
| RAID support | Yes[1] The opened exact-model page publishes TRAID storage and redundancy support. Available layouts still depend on the installed SATA/M.2 media and drive count. |
| Backup through the graphical interface | Yes[1][6] The exact-model page identifies TOS, and the official TOS 7 Duple Backup guide documents its graphical task interface. Package availability and menus can still vary by installed build. |
| Backup to an independent target | Yes[1][6] The exact-model page identifies TOS, and the official TOS 7 Duple Backup guide documents remote TNAS, file-server and cloud destinations outside the source enclosure. |
| Documented restore path | Yes[1][6] The exact-model page identifies TOS, and the official TOS 7 Duple Backup guide provides restore tasks from existing jobs and retained .duple data. |
| Scheduled backup | Yes[1][6] The exact-model page identifies TOS, and the official TOS 7 Duple Backup guide documents task execution schedules. |
| Restore from snapshots | Yes[1][7] The exact-model page identifies TOS, and the official TOS 7 Snapshot guide documents local and remote snapshot restore paths. It requires a supported TOS version, BTRFS and an applicable folder or LUN configuration. |
| Version retention | Yes[1][6] The exact-model page identifies TOS, and the official TOS 7 Duple Backup guide documents multi-version backup, version selection and retention counts. |
| Immutable protection | HyperLock-WORM protection is published; configuration and administrator boundaries need verification[1] The current exact-model page publishes a HyperLock WORM 70-year immutability claim. The opened page does not fully establish setup prerequisites, enforcement against every administrator path or the effective retention setting, so this remains a buying-relevant gap. |
| Remote snapshot replication | Yes[1][7] The exact-model page identifies TOS, and the official TOS 7 Snapshot guide documents scheduled duplication and snapshot replication to a remote TNAS, subject to its stated setup requirements. |
| Native endpoint restore | Endpoint restoration workflow not independently verified[1] Backup app availability and a file restore path do not alone establish full endpoint recovery. |
| Official system update path | Current product page advertises TOS 7; exact update package not verified[1] Support download service returned an error and release-topic pages were blocked. This is a package-verification gap, not proof that official updates are unsupported. |
| System status interface | Yes[1][9] The exact-model page identifies TOS, and the official TOS 7 Device Monitoring guide documents hardware, storage, resource and network status views. |
| System log interface | Yes[1][10] The exact-model page identifies TOS, and the official TOS 7 System Logs guide documents a categorized log interface. |
Warranty and support
Official specifications and applicable conditions.
| Standard warranty | 2 years[2] |
|---|
Physical, power and acoustics
Official specifications and applicable conditions.
| Dimensions | 150 × 181 × 219 mm (H×W×D)[1] Current official table explicitly separates N350 and N305; relevant shared chassis rows apply to both. |
|---|---|
| Weight | Net 2.9 kg; gross 4.1 kg[1] Current official table explicitly separates N350 and N305; relevant shared chassis rows apply to both. |
| Power supply and consumption | 90 W adapter; operating and hibernation consumption not published in the current N305 table[1] Current official table explicitly separates N350 and N305; relevant shared chassis rows apply to both. |
| Acoustic conditions | 20.9 dB(A); four SATA drives in standby, 17.3 dB(A) background, 1 m[1] Current official table explicitly separates N350 and N305; relevant shared chassis rows apply to both. |
Official N305 specification
Official specifications and applicable conditions.
| Processor Model | Intel N305[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
|---|---|
| Processor Architecture | x86 64-bit[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| Processor Frequency | Up to 3.8 GHz burst[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| Hardware Transcoding Engine | H.264, H.265, MPEG-4 and VC-1; up to 4096 × 2160 at 60fps (manufacturer engine capability, not every app/codec combination)[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| System Memory | 8 GB non-ECC SODIMM[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| Pre-installed Memory Module | 1 × 8 GB non-ECC SODIMM[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| Total Memory Slot Number | 1 SODIMM[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| Maximum Supported Memory | 32 GB non-ECC SODIMM[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| DDR generation | Not resolved: AppleInsider says DDR4; Root-Nation and the exact Newegg listing say DDR5; current official N305 table omits generation[1][22][23][17] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| Disk Slot Number | 4[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| Compatible Drive types | 3.5-inch SATA HDD; 2.5-inch SATA HDD; 2.5-inch SATA SSD[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| Maximum Internal Raw Storage Capacity | 120 TB (4 × 30 TB SATA), before redundancy; marketing separately allows 3 × 8 TB NVMe for 144 TB total[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| M.2 2280 NVMe Slot | 3, PCIe 3.0 x1 each[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| Drive Hot Swap | Yes[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| Internal Drive | Btrfs, EXT4[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| External Drive | EXT3, EXT4, NTFS, FAT32, HFS+, Btrfs[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| RJ-45 5GbE Network Port | 2[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| USB3.2 Host Port Type A | 3 × 10Gbps[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| USB3.2 Host Port Type C | 1 × 10Gbps[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| HDMI | 1 port; system-management output in the N305 review[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| Size (H*W*D) | 150 × 181 × 219 mm[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| Packaging Size (H*W*D) | 186 × 277 × 277 mm[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| System Fan | 120 × 120 × 25 mm, one fan[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| Fan Mode | Smart, High, Middle, Low[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| Redundancy Power Supply | No redundant power supply listed[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| AC Input Voltage | 100–240 V AC[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
| Current Frequency | 50/60 Hz[1] Current table identifies N350 and N305 separately; independent test conditions are kept in review records. |
Exact product identity & open questions
- Product ID
- terramaster-f4-425-pro-n305[1]
- Exact MPN or manufacturer configuration ID
- F4-425 Pro N305[1]
- Model
- F4-425 Pro N305[1]
- Factory compute and memory
- Intel N305, eight cores; factory 8 GB non-ECC SODIMM, DDR generation unresolved[1]
- Storage layout
- 3.5-inch SATA HDD / 2.5-inch SATA SSD / M.2 NVMe[1]
- Memory generation: Official N305 capacity and slot count are confirmed, but DDR generation conflicts across sources. Confirm the fitted module and compatible replacement.
- Benchmark conditions: The direct N305 review lacks a complete storage/network setup and transcoding codec matrix. Root-Nation repeats similar results without enough detail to establish an independent benchmark.
- Power and software ceilings: The current shared N305/N350 hardware table is available, but exact N305 operating power and full software-user/LUN/application limits are not published there.
- Recovery and current build: No complete restore drill, detailed immutable-retention enforcement test or precise shipping/update package was verified.
Sources
Research updated Sep 11, 2026. Individual source check dates are listed below. Measurements belong to the named reviewers; tested configurations and software versions may differ from the product you buy.
- [1] TerraMaster F4-425 Pro N305 official product page ↗
Checked Sep 10, 2026 · Exact model page, hardware description, configuration selector and current feature sections
- [2] F4-425 Pro N305 official product and configuration page ↗
Checked Sep 10, 2026 · F4-425 Pro Specifications → N305 row / System Memory / Drive Hot Swap / Storage / Network; store warranty banner; Intel comparison → i3-N305 row; NAS Specifications → Processor Model; JSON variants option1=N305 / id / sku; Specifications → N305 memory; Official first post → target users / Update Procedure; exact product → TOS7 / CPU architecture; TOS7 / BBS / TRAID Elastic Storage / HyperLock WORM marketing
- [3] F4-425 Pro N305 published Shopify product JSON ↗
Checked Sep 10, 2026 · JSON variants option1=N305 / id / sku; Specifications → N305 memory
- [4] Comparison Chart for Intel N-Series Processors ↗
Checked Sep 10, 2026 · Intel comparison → i3-N305 row; NAS Specifications → Processor Model
- [5] TOS 7.0.1105 x86 official release ↗
Checked Sep 7, 2026 · Official first post → target users / Update Procedure; exact product → TOS7 / CPU architecture
- [6] TOS7 Duple Backup ↗
Checked Sep 10, 2026 · Duple Backup → How to Create a Backup Task / Multi-Version Mode / Restore
- [7] TOS7 Snapshot ↗
Checked Sep 10, 2026 · Snapshot → Requirements / Schedules / Retention / Duplicate / Restore
- [8] TOS7 TFM Backup ↗
Checked Sep 10, 2026 · TFM Backup → introduction / How to Create / Incremental Mode
- [9] TOS7 Device Monitoring ↗
Checked Sep 10, 2026 · Device Monitoring → Overview / Resource Usage
- [10] TOS7 System Logs ↗
Checked Sep 10, 2026 · System Logs → introduction / Management and Operations
- [11] tos7-x86-release ↗
Checked Sep 8, 2026 · TM Support official first post 2026-08-04; exact product TOS7/CPU statement
- [12] terramaster-f4-425-pro-n305 ↗
Checked Sep 10, 2026 · TM Support official first post 2026-08-04; exact product TOS7/CPU statement; JSON product.variants[id=46428396453922] → title / sku / options; hardware original-memory section
- [13] terramaster-f4-425-pro-n305-variants ↗
Checked Sep 10, 2026 · JSON product.variants[id=46428396453922] → title / sku / options; hardware original-memory section
- [14] TerraMaster first-party variant data for F4-425 Pro N305 ↗
Checked Sep 10, 2026 · First-party variant endpoint; variant 46428396453922; N305 / Silver; SKU not published; available=true; price and selection data only
- [15] TerraMaster exact selected product page for F4-425 Pro N305 ↗
Checked Sep 10, 2026 · Exact selected PDP URL for variant 46428396453922. The base PDP was opened successfully on 2026-09-10T01:13:31.933Z; SKU, price and availability came from first-party endpoint https://www.terra-master.com/products/f4-425-pro.js at 2026-09-10T01:13:21.680Z. The query-specific PDP was not represented as a separate fetch.
- [16] F4-425 Pro Shopify JSON ↗
Checked Sep 11, 2026 · N305 / Silver id 46428396453922 price 59499 available true
- [17] Newegg F4-425 Pro N305 ↗
Checked Sep 11, 2026 · TERRAMASTER OFFICIAL $559.99 Item 9SIAA3NKWA1050
- [18] Macworld F4-425 Pro ↗
Checked Sep 11, 2026 · Test unit Intel N350 16GB
- [19] Notebookcheck F4-425 Pro ↗
Checked Sep 11, 2026 · Tested N350 16GB; N305 8GB mentioned as other SKU
- [20] How-To Geek F4-425 Pro ↗
Checked Sep 11, 2026 · Discusses N305 8GB and N350 16GB; tested CPU not stated
- [21] TechRadar F4-425 Pro ↗
Checked Sep 11, 2026 · N350-focused; Amazon 8GB Silver $594.99 is a buy link
- [22] Terramaster F4-425 Pro review: Excellent set-and-forget networking hardware ↗
Checked Sep 11, 2026 · Original article and recorded parent findings.
- [23] TerraMaster F4-425 Pro (N305) review: a home server that mostly undersells itself ↗
Checked Sep 11, 2026 · Full web-readable article; local HTTP requests returned 403.
Research and review record
- Research: Grok 4.6 · Source research and data update
- Self-check: Grok 4.6 · Researcher self-check
- Independent review: GPT-6 (Codex) · Independent original text/table review and explicitly recorded chart readings; full applicable official tables, exact merchant variant checks, evidence attribution and reader guidance. Blocked and unviewed material remains identified.
- Editorial integration: GPT-6 (Codex) · Editorial integration and validation
Independent review completed for the scope recorded in the audit.
Source evidence and review history (JSON)