Asustor AS6004 NAS Storage Capacity Extender



  • Plug and play online expansion
  • Secure safety bracket Connection via USB cable
  • Intelligent power synchronization helps save power
  • Intelligent temperature control for stable operation
  • Supports MyArchive backup technology
  • Compatible with high-capacity 16TB hard drives

Simply plug in

Connect the AS6004U to any ASUSTOR NAS to complete hardware expansion using a USB 3.0 connection cable! Depending on model *, ASUSTOR NAS devices can simultaneously connect up to 3 AS6004U units that meet the high capacity storage demands of enterprise users.

* NAS series supporting expansion up to 3 units: AS31 / 32/50/51/52/53/61/62/63/64/70 (other series can only expand to 2 units)

* To connect AS6004U, please contact NAS back Use the USB 3.0 port

* Use the USB 3.0 cable provided by ASUSTOR * If 12 devices are connected to the USB 3.0 port on the 70-series models (1 hard drive = 1 device), other USB ports will not be available.

Security Bracket for Secure Connections

Safety bracket and mounting hole design;The AS6004U allows the USB cable to be securely connected without having to worry about disconnection.

Secure Disc Tray Lock Design

Users have added a new lock mechanism to ASUSTOR, to prevent hard disk removal during operation, by accidentally pressing the buttons on the disc tray.Users do not need a special key or tool to unlock it.Only a simple flat head screwdriver can control the locks.

Smart Power Saver

The AS6004U has a power synchronization mechanism that synchronizes with the NAS's operating state.If the NAS enters sleep mode or shuts down, the AS6004U enters standby mode.When the NAS returns to normal operation, the AS6004U will continue to connect to the NAS.This function works to help users save significant power.

Intelligent Fan for Temperature Control

The internal temperature of the system increases during heavy loading and operating conditions.The AS6004U uses a wide speed range fan that supports the temperature control function in combination with an intelligent speed mechanism.As the system load and temperature increase, the fans will automatically increase the speed for cooling the device and ensure a stable operating temperature and service, ensuring that the system maintains an appropriate operating temperature.

Secure Storage

The AS6004U is compatible with 4 hot-swappable disk slots and the largest hard drives on the market.Supports RAID * and AES 256-bit encryption, providing the best data protection mechanisms.


Flexible Storage Expansion and Backup

In addition to providing economical high-capacity storage, the AS6004U supports ASUSTOR's MyArchive backup technology.This allows users to create removable storage archives and back up important data to them at any time.

First-Class Product Warranty

All ASUSTOR NAS products come with a 3-year warranty.ASUSTOR continues to make the customer service a priority.


Hardware & Packaging

Hardware Features

  • Flash Memory: 16MB Flash
  • Expansion: USB 3.0 (USB3.1 Gen-1) Type B
  • HDD: 4 x SATA3 6Gb / s;3.5 "/2.5" HDD / SSDCompatibility
  • Maximum Internal Raw Capacity: 64 TB (16 TB HDD X 4, Capacity may vary depending on RAID types)
  • Maximum Single Partition Size: 16TB
  • Hot-swappable drive
  • System Fan: 120mm x1
  • Power Supply Unit / Adapter: 90W x1
  • Input Voltage: 100V to 240V AC
  • Certification: FCC, CE, VCCI, BSMI, C-TICK


  • Energy consumption:
    • Operation: 23.6 W
    • Disk Hibernation: 9.7 W
    • Sleep mode: 0.35W
  • Operating Temperature: 0 C ~ 40 C (32 F ~ 104 F)
  • Humidity: 5% to 95% RH

Size and Weight

  • Dimension: 185.5 (H) x 170 (W) x 230 (D) mm
  • Weight: 2.7 kg / 5.95 lbs

Software & Features


  • From ADM 3.0

File System

  • Internal Drive: EXT4

Storage Management

  • Supports Multi-Disk Volumes with Redundant Disks
  • Disk Volume Type: Single disk, JBOD, RAID 0, RAID 1, RAID 5, RAID 6, RAID 10
  • Online RAID Level Migration Support

myarchiv to

  • Insert the Hard Disk and Access Files Now
  • Transfer or Exchange Terabytes of Data with the Built-in Hot-Swap Interface
  • Up to 2 Slots Reserved for MyArchive Docking Purposes










No additional files, specification sheets, guides or documentation found for product.

Warranty: 36

Full manufacturers warranty details are available at the manufacturers web site.

Unless otherwise specified Techbuy is normally your first point of contact for warranty related returns, further information regarding our warranty policies and consumer guarantees is available on our policies and service & support pages.

To apply for return of a product just go to our returns page.

These terms are in addition to and do not affect any terms, conditions, guarantees and warranties implied by law.

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