ASUSTOR Drivestor 4 Gen2 (AS1204T) — 4-bay NAS with 2.5GbE and RAID 5/6
4-bay NAS2.5GbEQuad-core 1.7GHzRAID 5 / 6 / 10
The ASUSTOR Drivestor 4 Gen2 (AS1204T) is a 4-bay NAS for homes and small offices, powered by a Realtek RTD1619B quad-core 1.7GHz processor with 1GB DDR4 memory and a 2.5-Gigabit Ethernet port, for shared storage, PC backups and media streaming with drive-failure protection.
With four bays it supports RAID 5, RAID 6 and RAID 10, so you can balance capacity and protection — and add drives later as your data grows. ASUSTOR's ADM operating system handles file sharing, backups and 10-bit 4K H.265 transcoding for smooth playback on TVs and phones.
Before you order: The NAS is supplied without drives — add 3.5" SATA hard drives (at least three for RAID 5, four for RAID 6/10). Full 2.5GbE speed needs 2.5GbE ports on your switch/router and PC; on a Gigabit network it runs at 1Gbps.
What's in the Box
- ASUSTOR Drivestor 4 Gen2 AS1204T NAS (no drives included)
- 90 W external power adapter
- Full accessory list not published on the product page — ask us if you need cables or screws confirmed
What It Means in Practice
- RAID 5 with four drives gives the capacity of three and survives one drive failure; RAID 6 survives two.
- 2.5GbE delivers roughly 2.5× Gigabit speed for large file copies when the network supports it.
- USB 5Gbps ports let you back up the NAS to an external drive.
- Memory is 1GB and cannot be upgraded — fine for files, backups and media, not for virtual machines.
What Will Not Work
- M.2 SSD caching — there are no M.2 slots, and ASUSTOR lists 3.5" SATA HDDs for the bays.
- Memory upgrades or PCIe expansion cards — neither is available.
- 10GbE networking — the single network port is 2.5GbE.
- HDMI output for direct TV connection — there is no HDMI port.
Key Features
2.5GbE networking
Faster transfers than Gigabit NAS units, backwards compatible with 1GbE.
4K transcoding
Hardware transcoding of 10-bit 4K H.265 video for streaming to any device.
Quiet operation
22.8 W in operation, 19.7 dB noise and a single 120 mm fan.
Expandable
Supports ASUSTOR expansion units for up to 320TB raw capacity.
Technical Specifications
| Identification |
| Part Number |
90-AS1204T00-MA30 |
| EAN/GTIN |
4710474831944 |
| Model |
ASUSTOR Drivestor 4 Gen2 (AS1204T) |
| Brand |
ASUSTOR |
| Hardware |
| Processor |
Realtek RTD1619B, ARM64 quad-core 1.7GHz, hardware encryption engine |
| Memory |
1GB DDR4 (not expandable) |
| Flash |
8GB eMMC |
| Drive bays |
4 × 3.5" SATA HDD |
| Max internal capacity |
72TB (18TB × 4) |
| With expansion units |
320TB (20TB × 16) |
| RAID |
Single, JBOD, RAID 0, 1, 5, 6, 10 |
| Connectivity |
| Network |
1 × 2.5GbE RJ-45 |
| USB |
3 × USB 5Gbps Type-A |
| Power & physical |
| Power adapter |
90 W, 100–240 V |
| Power consumption |
22.8 W operation · 9.41 W disk hibernation |
| Noise |
19.7 dB |
| Fan |
1 × 120 mm |
| Dimensions |
165 × 164 × 218 mm |
| Weight |
1.57 kg |
| Operating system |
ASUSTOR ADM |
| Warranty |
| Warranty |
1-Year Warranty (Singular) |
| Manufacturer Term |
3-year manufacturer warranty per ASUSTOR — claims handled through Singular |
Frequently Asked Questions
How many drives do I need to start?
One drive works as a single volume, but for protection start with at least two (RAID 1) or three (RAID 5). Use NAS-rated drives of the same capacity.
Can I add drives later?
Yes, ADM supports expanding and migrating RAID volumes as you add disks; back up first.
Will it work on a Gigabit network?
Yes. The 2.5GbE port falls back to 1Gbps; you gain the extra speed only with 2.5GbE switch and PC ports.
Singular Expert Insight · Buyer's Guide
The AS1204T is the more future-proof Drivestor: four bays make RAID 5 or RAID 6 possible, so you get both capacity and real protection, and 2.5GbE keeps transfers quick. A NAS is still not a backup on its own — keep a copy of critical data elsewhere. Choose matching disks from our
NAS hard drives.
✓ Buy it if you want protected network storage that can grow, for a home media library or a small office.
✕ Skip it if you need SSD caching, 10GbE, or memory for virtual machines and Docker workloads.
→ Also consider the Lockerstor 6 Gen2+ (AS6706T v2) if you need M.2 caching, 5GbE and more processing power.
Not sure which drives or RAID level fit your data? Tell us how much storage you need and we will suggest a matching set before you order.