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Rectangular black docking station with two vertical drive slots and USB cable

Tripp Lite

Tripp Lite U339-002 USB 3.0 Dual SATA Drive Enclosure

SKU CH-TK35-DRADH MPN U339-002

Dual-bay SATA docking station clones or accesses two 2.5 or 3.5 inch drives over USB 3.0 simultaneously

  • Drive interfaceSATA
  • External connectionUSB 3.0
  • Product typeOffice Products
  • Product weight1.55
  • In the boxU339-002 USB 3.0 SuperSpeed to Dual SATA External Hard Drive
  • Read and write to two drives simultaneously with dual SATA slots
  • Accepts 2.5" or 3.5" SATA drives up to 4TB capacity
  • USB 3.0 SuperSpeed interface delivers fast data transfer rates
  • Offline cloning duplicates drives without a host computer connected
  • Compatible with Windows, Mac and Linux operating systems

Dual SATA docking station for 2.5

This enclosure accepts two SATA hard drives or solid-state drives at once, each up to 4 TB. It connects to a host computer through a USB 3.0 SuperSpeed port and includes an external power supply with a NEMA 1-15P plug. The unit works with Windows, macOS and Linux without extra drivers.

Tool-free bays and always-on power

Each bay is open-top so drives slide in vertically without screws or trays. The supplied 12 V 3 A adapter powers both slots continuously, so drives stay ready for immediate access. A 2.5 ft USB 3.0 cable links the dock to the host, and the dock draws from the 100-240 V 50/60 Hz mains input.

USB 3.0 bandwidth caps peak throughput

The USB 3.0 link limits combined read and write speeds to the interface maximum, so two active SATA III drives will share that ceiling. Offline cloning runs entirely inside the dock and does not use the USB path, but any file transfer to the computer stays bound by the 5 Gbps connection. Buyers needing higher sustained rates with multiple drives should consider a direct internal SATA or faster external interface.

How it compares

Measured against everything we stock in External Drive Enclosures, at today’s prices. Recalculated every night.

Price $66.99
Pricier than about 70% of the 821 comparable items (median $30.99).

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Specifications

Product
Brand nameTripp Lite
Model nameU339-002
Product typeOffice Products
Storage
Drive interfaceSATA
Ports & slots
External connectionUSB 3.0
Size & build
Shipping weight1.13 kg
Package size356 × 279 × 279 mm
In the box
In the boxU339-002 USB 3.0 SuperSpeed to Dual SATA External Hard Drive Docking Station
2.5-ft. USB 3.0 Device Cable
External Power Supply with NEMA 1-15P Plug (Input: 100-240 V, 50/60 Hz, 1.5A; Output:12 V, 3A)
Owner’s Manual

Questions about this item

What real-world speed does the USB 3.0 interface limit each SATA drive to?

The USB 3.0 connection caps each drive at SuperSpeed rates, so a SATA III SSD will hit the bus ceiling instead of its native 6 Gbps ceiling.

Which drive sizes and power input does the dock accept?

It takes 2.5" and 3.5" SATA drives up to 4 TB each, powered by the included 12 V 3 A external supply with a NEMA 1-15P plug.

How do I start a hardware clone without a PC, and what mistake stalls it?

Insert the source drive in slot A and the target in slot B, power on, then hold the clone button until the LEDs flash — releasing too early aborts the copy.

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