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Black plastic dual-bay SATA dock with USB 3.0 cable and power adapter

STARTECH

STARTECH SDOCKU33BV USB 3.0 SATA III Dual Drive Dock 2.5/3.5

SKU CH-H55N-J72V0 MPN SDOCKU33BV

Dual-bay dock connects two 2.5" or 3.5" SATA drives via USB 3.0 with UASP 1.0 support

  • Size2.5 in & 3.5 in
  • Drive interfaceSATA I/II/III
  • External connection1 x USB Type-B (9 pin) USB 3.0 Female
  • Supported drivesDual HDD
  • Bay count1
  • Power detailsUniversal Power Adapter

Size USB 3.0

  • Dual 2.5″ and 3.5″ SATA drive support for flexible storage access
  • UASP over USB 3.0 delivers 70% faster transfers than standard USB 3.0
  • Works with SATA I, II and III drives without extra drivers
  • Universal power adapter included for worldwide compatibility
  • Compact black dock measures 2.00″ × 3.60″ × 5.50″ and weighs 24.90 oz

Dual SATA Dock for 2.5 and 3.5 Inch Drives

This docking station accepts both 2.5in and 3.5in SATA hard drives and solid-state drives. It connects to a host over USB 3.0 with UASP support for faster data transfers. The unit is OS independent and requires no drivers or software installation. It suits technicians and home users who need quick, temporary access to bare drives.

USB 3.0 Interface Limits at 5 Gbps

The external link runs at USB 3.0 speeds of 5 Gbps and falls back to USB 2.0 at 480 Mbps or USB 1.1 at 1.5 Mbps. UASP support reduces protocol overhead compared with traditional USB 3.0 bulk endpoints. SATA I, II and III drives are all accepted, but the USB 3.0 bus caps the maximum throughput regardless of the drive’s native SATA revision.

Tool-Free Insertion with Universal Power

Drives slide into the top-loading slot without screws or trays. A universal power adapter with NA, EU, UK and AU plugs is included alongside a USB 3.0 cable. The dock has no fan, so sustained heavy workloads on high-capacity mechanical drives may run warmer than in an actively cooled enclosure.

How it compares

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

Price $40.99
Pricier than about 58% of the 821 comparable items (median $30.99).

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Specifications

Product
Brand nameStarTech.com
Model nameSDOCKU33BV
Product colorBlack
Product typeDock
Storage
Drive interfaceSATA I/II/III
Supported drivesDual HDD
Bay count1
Ports & slots
External connection1 x USB Type-B (9 pin) USB 3.0 Female
Power
Power adapterYes
Power detailsUniversal Power Adapter
Size & build
Size2.5 in & 3.5 in
Main materialPlastic
Product dimensions2 in × 3.6 in × 5.5 in
Product weight24.9 oz
Shipping weight0.73 kg
Package size173 × 163 × 91 mm
Compatibility
Supported operating systemsOS independent; No software or drivers required
In the box
In the box1 x USB 3.0 SATA hard drive docking station
1 x USB 3.0 Cable
1 x Universal Power Adapter (NA/EU/UK) and AU in Australia
1 x Instruction Manual
More details
Cooling fansNo

Other versions of this model

2 more in the same range

Questions about this item

Should I choose the single-bay or dual-bay version of this dock?

This model has one bay that accepts either a 2.5in or 3.5in SATA drive; a second drive can be swapped in when needed.

What does the 70 % faster claim mean when I connect a SATA III SSD to my laptop?

UASP support reduces protocol overhead so sustained transfers approach the USB 3.0 5 Gbps limit instead of the lower bulk-endpoint throughput.

Does the USB 3.0 Type-B port cap the speed of a 6 Gbps SATA III drive?

Yes, the USB 3.0 5 Gbps link is the bottleneck; the drive will run at up to 5 Gbps rather than its native 6 Gbps.

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