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Startech Rugged Hard Drive Enclosure - USB 3.0 to 2.5in SATA 6Gbps HDD or SSD - UASP - Black



This rugged drive enclosure redefines data protection for on-the-go professionals. The military-grade construction protects your sensitive data from harsh field conditions. It makes sure youre equipped for unexpected challenges with a ruggedized water, dust, vibration and shock resistant enclosure.

Industry recognized protection against water and dust, with an IP54 rating

Rugged enclosure sitting outdoors on a rock bed in the rain

Rugged enclosure sitting outdoors on a rock bed in the rain

Keep your data safe and secure even through sudden downpours or dust storms. The robust enclosure provides superior water and dust resistance with an IP54 rating.

Diagram of 4 meter (13 feet) drop test

Drop tested for 4 meters (13 feet)

The rugged drive enclosure is enveloped in a silicone protective sleeve, and engineered to help protect your drive from accidental and unexpected shock, vibrations, and drops. Its Military MIL-STD-810G rated and test-proven to withstand drops of up to 4 meters (13 feet). It was drop tested using a solid-state drive in the enclosure.

Photo of rugged enclosure shown open with protective silicone sleeve beside

Data protection inside and out

Wherever you go, the rugged drive enclosure delivers reliable data protection, inside and out. The tough-wearing exterior casing provides shock-resistance, while the flexible silicone sleeve hugs the entire perimeter to ensure an extra measure of protection, absorbing the impact of accidental bumps, rough baggage handling or drops. Inside, an extra layer of silicone provides added drive stability.

Diagram for tool-less design with a no-symbol over a screwdriver

Install your drive with ease, with a tool-less design

Its easy to turn your 2.5in SATA III (6Gbps) solid-state drive or hard drive into external storage. Simply remove the silicone sleeve, open the latch to insert your 2.5" drive into the rugged enclosure, and plug the included USB cable into the computer or hub USB port. There are no screws or tools needed.

Speed diagram showing enhanced performance for UASP, 70% faster than traditional USB

70% faster than traditional USB 3.0, with UASP

Save time in the field, by storing and transferring content quickly. Enhanced with UASP (USB Attached SCSI Protocol), this rugged drive enclosure performs with a 70% faster read speed and 40% faster write speed over conventional USB 3.0, when paired with a UASP-enabled host controller.

UASP is supported in Windows 8, Mac OSX (10.8 or above), and Linux. In testing UASP performs with a 70% faster read speed and 40% faster write speed over traditional USB 3.0 at peak performance.

At the same peak in testing UASP also shows an 80% reduction in required processor resources.

Testing results were obtained using an Intel Ivy Bridge system, a UASP enabled enclosure, and a SATA III (6Gbps) solid state drive.

The S251BRU33 is backed by a 2-year warranty and free lifetime technical support.



OS independent; No software or drivers required

Warranty Information


2 Years

1 - Connector A

SATA Data & Power Combo (7+15 pin)

1 - Connector B

USB 3.0 Micro-B (10 pin, SuperSpeed)


1 - Drive Connectors

SATA Data & Power Combo (7+15 pin)

1 - Host Connectors

USB 3.0 Micro-B (10 pin, SuperSpeed)


Operating Temperature

-40C to 85C (-40F to 185F)

Storage Temperature

-40C to 85C (-40F to 185F)


20% ~ 95% RH



USB 3.0

Bus Type

USB 3.0

Industry Standards

MIL-STD-810G, Method 503.5 (Thermal Shock)

MIL-STD-810G, Method 514.6 (Vibration)

MIL-STD-810G, Method 516.6 (Shock)

MIL-STD-810G, Method 507.5 (Humidity)

MIL-STD-810G, Method 509.5 (Salt Spray)

MIL-STD-810G, Method 510.5, Procedure I (Sand and Dust)

MIL-STD-810G, Method 508.6 (Fungus)

Number of Drives


Drive Size


Compatible Drive Types


Drive Installation


Number of 2.5 inch bays


Supported Drive Height(s)



Chipset ID

ASMedia - ASM1153E


1 - LED Indicators

Diagnostic LED (Drive Power and Activity)

Packaging Information

Package Height

2.2 in [57 mm]

Package Length

7.2 in [18.3 cm]

Shipping (Package) Weight

14.2 oz [402 g]

Package Width

5.5 in [13.9 cm]


Maximum Data Transfer Rate

5 Gbps

Type and Rate

USB 3.0 - 5 Gbit/s

UASP Support


TRIM Support


4Kn Support


Type and Rate

SATA III (6 Gbps)

Max Drive Capacity

Tested up to 2TB at 7200 RPM

Hot Swap Capability


Physical Characteristics



Cable Length

4.1 in [10.3 cm]

Product Length

5.6 in [14.3 cm]

Product Width

4.4 in [11.2 cm]

Product Height

1.1 in [29 mm]

Weight of Product

9.4 oz [265 g]


Power Source



OS Compatibility

OS independent; No software or drivers required

Special Notes / Requirements


Windows 7 and earlier Windows versions do not support TRIM with USB to SATA devices.

What's in the Box

1 - Included in Package

USB 3.0 rugged 2.5in enclosure

USB 3.0 cable

Foam pad for 7mm drives

Instruction manual

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

Warranty: 12 Month Return To Base

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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