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SK-2520 U3.1
USB 3.1 Gen2 Dual-Bay 2.5" RAID Enclosure

USB-C / SATA 6.0GB/s
Utilize two striped SSDs for incredible speeds
The SK-2520 U3.1 is a dual-bay storage enclosure with hardware RAID, designed for two 2.5-inch SATA drives. In combination with two striped SSDs and its fast SuperSpeed USB 3.1 10Gbps (USB 3.1 Gen 2) interface, this bus powered storage drive can deliver speeds up to 900 MB/s.
SuperSpeed USB 10Gbps (USB 3.1 Gen 2)
By incorporating the latest SuperSpeed USB 10Gbps (USB 3.1 Gen 2) technology, the SK-2520 U3.1 is able to deliver up to twice the speed of the USB 3.1 Gen 1 interface which runs at only 5Gbps. At the same time, with a corresponding USB-C to USB adapter cable, the device is still backwards compatible with the widely used USB 3.0 and USB 2.0 technology.
Reversible USB Type-C™ Connector with USB Power Delivery (PD)
The reversible USB Type-C (USB-C) connector enhances ease of use for connecting USB devices with a focus on minimizing user confusion for plug and cable orientation. When the external power adapter is plugged into the device the SK-2520 U3.1 supports power delivery (PD) over USB-C, providing 15W of power to laptops like the MacBook Pro (late 2016) that support charging from a 5V/3A power source. This allows you to work with the external drive without the battery levels of your laptop dropping even when the laptop is not plugged into any other power source.
USB Bus Power
This portable and compact USB drive can run on bus power alone without the need for an extra power adapter if the host computer provides sufficient bus power and the drive's power consumption stays below 7W per drive. An external power adapter is included if bus power is insufficient.
Hardware RAID Controller
With the built-in hardware RAID controller you can mirror the drives with RAID 1 as a reliable backup for your important data, stripe the drives with RAID 0 for optimal performance and maximum transfer rates or you can select SPAN to combine the drives for large storage capacities. Even individually with Non-RAID, the SATA 6Gb/s interface allows each drive to run at full SATA-III speeds.

Product Specifications:

AKiTiO Part Number

  • SK25-U31AS-AKTU


  • Yes

PC Compatibility

  • Windows 7 or above

Mac OS Compatibility

  • mac OS 10.12.4 or above

Other Requirements

  • Computer with USB Type-C connector or otherwise a USB-C to USB Type-A adapter cable is required (not included)

Number of Bays

  • (2) 2.5" Drive Bays

RAID Modes Supported

  • Non-RAID
  • RAID 0 striping
  • RAID 1 mirroring
  • SPAN


  • (1) USB 3.1 Gen 2 Port

Data Rates

  • USB 3.1 Gen 2: up to 10Gbps (1250MB/s)
  • USB 3.0/3.1 Gen 1: up to 5Gbps (625MB/s)

Security Slot

  • +12V/3A


  • CE
  • FCC
  • VCCI
  • BSMI

Drives Supported

  • 2.5" SATA 6Gb/s SSD or HDD (Height 7mm - 15mm)
  • For RAID 0 & 1, two hard drives of identical capacity are recommended

Housing Material

  • High quality aluminum for optimized heat dissipation

Power Supply

  • USB bus power 5V/3A (host computer has to provide sufficient USB bus power)
  • UL-listed universal auto-switching

AC Input

  • 100-240V, 50-60Hz

DC Output

  • +12V/3A


  • 15W


  • Environmental (Operating)
    • Temperature (°F) 41° — 95°
    • Temperature (°C) 5° — 35°
    • Altitude -304.8 m to 3,048.0 m (-1,000 ft to 10,000 ft)
    • Humidity 5% to 95% non-condensing
  • Environmental (Non-Operating)
    • Temperature (°F) −4° — 140°
    • Temperature (°C) −20° — 60°
    • Altitude -304.8 m to 12,192.0 m (-1,000 ft to 40,000 ft)


  • Height: 2.2 cm (0.9 in)
  • Length: 15.5 cm (6.1 in)
  • Width: 15.2 cm (6.0 in)


  • Varies depending on drive mechanism installed


  • For best performance and power delivery (PD), use the included USB-C cable.
  • This enclosure is NOT compatible with drives that require 12V (e.g. Seagate Constellation or WD VelociRaptor).
  • If bus power is insufficient (e.g. for two drives with a power consumption of more than 7W per drive), the power adapter is required. Otherwise, the data or the disk may be damaged.
  • This product is backwards compatible with USB 3.0 but it requires a separate USB-C to USB adapter cable.
  • This product has components or design elements that are patented or patent pending.
Manufacturer provided specifications for AKiTiO p/n SK25-U31AS-AKTU UPC#: 888038002506



  • (1) SK-2520 U3.1 Storage Enclosure
  • (1) USB-C to USB-C cable (1 m)
  • (1) Power adapter
  • (1) Setup guide
AKiTiO SK-2520 U3.1 USB 3.1 Gen2 Dual-Bay 2.5" RAID Storage Enclosure Mfr P/N: SK25-U31AS-AKTU OWC SKU: AKTSK25U31AS Configurable hardware RAID controller (Non-RAID, RAID 0, RAID 1, SPAN). Supports SATA 6Gb/s (SATA-III) drives. Includes USB-C to USB-C cable. 2 Year OWC Limited Warranty
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