Asustor Xpanstor 4 (AS5004U) 4-Bay USB 3.2 Gen 2 NAS Storage Expansion Unit
The Asustor Xpanstor 4 (AS5004U) is a high-speed 4-bay NAS storage expansion unit designed to seamlessly expand the capacity of your existing Asustor NAS server or serve as a dedicated external DAS storage enclosure. Powered by a high-bandwidth USB 3.2 Gen 2 Type-C interface delivering up to 10Gbps data transfer speeds, it supports up to 4 x 3.5″ or 2.5″ SATA III HDDs/SSDs with high-capacity drive support (up to 22TB+ per bay). Featuring MyArchive cold backup technology, smart power synchronization with host NAS units, internal cooling management, and a durable aluminum-alloy chassis, it provides a fast, flexible, and reliable expansion solution for enterprise archives and large media libraries.
Key Features & Highlights
- High-Speed USB 3.2 Gen 2 Connectivity: Uses a 10Gbps USB 3.2 Gen 2 Type-C connection for fast, bottleneck-free file transfers and volume expansion.
- 4-Bay SATA III Storage Capacity: Accommodates 4 x 3.5″/2.5″ SATA III HDDs or SSDs for high-density storage expansion (supports up to 22TB+ per drive).
- Seamless NAS Volume Integration: Connects to Asustor NAS devices running ADM OS to expand existing storage pools or create independent storage volumes.
- MyArchive Cold Backup Support: Native support for MyArchive technology turns hard drives into removable, archived cold storage volumes.
- Smart Power Syncing: Automatically powers on, sleeps, or shuts down in sync with the connected host NAS server to conserve energy.
- Premium Metal Enclosure & Smart Fan: Constructed with a durable stainless steel/aluminum alloy body and a smart temperature-controlled cooling fan.
- Plug-and-Play Compatibility: Easy plug-and-play installation for host NAS systems, PCs, and workstations without complex driver setups.
Detailed Product Specifications
1. Hardware Architecture & Storage Performance
| Attribute | Specification Details |
|---|---|
| Brand / Manufacturer | Asustor |
| Model Name & Part Number | Xpanstor 4 / AS5004U (90-AS5004U00-M030) |
| Drive Bays / Interface | 4 × 3.5″ / 2.5″ SATA III 6Gb/s HDD/SSD Bays |
| Maximum Tested Drive Capacity | Supports 22 TB+ Drives per Bay (Diskless Enclosure) |
| Host Connection Interface | 1 × USB 3.2 Gen 2 Type-C (10 Gbps Transfer Rate) |
| Cold Backup Technology | Asustor MyArchive Technology Supported |
| Installation & Mounting | External Desktop Tower / Plug-and-Play Setup |
2. Physical, Power & Warranty Specs
| Attribute | Specification Details |
|---|---|
| Enclosure Materials | Stainless Steel, Carbon Steel & Aluminum Alloy Construction |
| Color / Finish | Sleek Black Chassis |
| Product Net Weight | 2.3 kg (5.07 lbs) |
| Target Host Devices | Asustor NAS Servers, Windows/Mac PC Workstations |
| Manufacturer Warranty | 3-Year Limited Manufacturer Warranty |
| GTIN / UPC | 04710474831548 |
Package Contents
- 1 x Asustor Xpanstor 4 (AS5004U) 4-Bay Expansion Unit
- 1 x USB 3.2 Gen 2 Type-C to Type-C/Type-A Cable
- 1 x Power Adapter & Power Cord
- 1 x Screws Pack for 3.5″ and 2.5″ Hard Drives
- 1 x Quick Installation Guide
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