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Black aluminum 2.5 inch SATA drive enclosure with USB 3.1 cable

STARTECH

STARTECH S251BMU313 2.5" USB 3.1 Gen 2 Drive Enclosure

SKU CH-GAQE-XN1HJ MPN S251BMU313

Aluminium enclosure turns a 2.5" SATA SSD or HDD into a 10 Gbps USB 3.1 Gen 2 portable drive with UASP support

  • Drive interfaceSATA I/II/III
  • External connectionUSB 3.1
  • Product colorBlack
  • Product typeSee Details
  • Main materialAluminum
  • Key featuresGet ready for ultra-fast USB 3.1 Gen 2 (10 Gbit/s) data stor
  • USB 3.1 Gen 2 delivers 10 Gbps transfer speeds for fast external storage
  • UASP support reduces latency and improves throughput with compatible drives
  • Aluminium housing dissipates heat to keep the drive running cool
  • Powered directly from the USB port so no separate adapter is needed
  • Compact .6 inch height fits easily in a bag for portable use

Portable 2.5" SATA Enclosure

The StarTech S251BMU313 turns a 2.5" SATA SSD or hard drive into portable external storage. An aluminium shell protects the drive while dissipating heat during extended transfers. Power comes directly from the host USB port so no separate adapter is needed. A USB Type-A to Micro-B cable and mounting screws are included for immediate setup.

Suits single-drive backups, not multi-bay arrays

This enclosure is built for users who want one 2.5" SATA drive available over USB while travelling or moving between workstations. It does not accept 3.5" drives, M.2 modules or multiple drives at once. Builders who need RAID configurations or tool-less hot-swap bays should look at larger chassis instead.

USB 3.1 Gen 2 at 10 Gbps with UASP

The external interface runs at 10 Gbps and supports UASP to reduce protocol overhead on compatible hosts. Internal SATA I, II and III drives are all accepted, with the enclosure bridging to the faster USB link. Actual throughput will depend on the installed drive and the host controller.

How it compares

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

Price $36.99
Pricier than about 55% of the 821 comparable items (median $30.99).

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Specifications

Product
Brand nameStarTech.com
Model nameS251BMU313
Product colorBlack
Product typeSee Details
Storage
Drive interfaceSATA I/II/III
Ports & slots
External connectionUSB 3.1
Size & build
Main materialAluminum
Product dimensionsHeight:0.6 in × Width:3 in × Depth:4.7 in
Product weight4.59 oz
Shipping weight0.16 kg
Package size160 × 124 × 30 mm
In the box
In the boxUSB 3.1 Gen 2 (10 Gbit/s) Enclosure for 2.5 in SATA Drives
1 x USB Cable
4 x Assembly Screws
1 x Screw Driver
1 x Quick Start Guide

Questions about this item

Does the enclosure come with a SATA drive or do I need to supply my own 2.5" SSD or HDD?

You must supply your own 2.5" SATA SSD or HDD; the package includes the aluminium enclosure, a USB Type-A to Micro-B cable, four assembly screws, a screwdriver and a quick-start guide.

The specs list USB 3.1 Gen 2 at 10 Gbps and SATA III at up to 6 Gbps — which one limits real-world speed?

The SATA III interface caps sustained transfers at 6 Gbps, so the drive inside determines the practical ceiling even though the USB link can handle 10 Gbps.

Will I see the full 10 Gbps USB 3.1 Gen 2 rate when copying large files to a SATA III SSD in this enclosure?

No, the SATA III bottleneck limits large-file throughput to roughly 6 Gbps; the 10 Gbps USB link mainly helps with burst transfers and UASP overhead reduction.

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