eSATAp / eSATA or USB 3.0 External 2.5in SATA III 6 Gbps Hard Drive Enclosure with UASP – Portable HDD / SDD

Turn a 2.5” SATA III HDD / SSD into an external hard drive that can connect to your computer through either eSATAp at 6 Gbps, or USB 3.0 with UASP at 5 Gbps

Product ID: S251SMU33EP

4 stars (1 reviews) |
  • Supports SATA III & UASP for optimal performance
  • eSATA or USB 3.0 interface options
  • Supports power over eSATA (eSATAp, eSATA/USB combo port) with no additional power adapter
Your price
€53.99 EUR excl. VAT
€65.87 EUR incl. VAT

The S251SMU33EP USB 3.0 / eSATAp drive enclosure turns a 2.5in SATA hard drive (HDD) or solid state drive (SSD) into an external portable hard drive that can connect to any USB or eSATA-enabled computer system.

For fast performance and efficient data transfers when connected through eSATA, the enclosure supports full SATA III transfer speeds -- up to 6 Gbps. For universal compatibility, the S251SMU33EP can be connected through USB 3.0 with transfer speeds up 5 Gbps plus support for UASP, which delivers performance up to 70% faster than conventional USB 3.0 when paired with a UASP-enabled host controller to utilize the full potential of your SATA III hard drives. See our UASP testing results below for further details.

Designed for maximum portability, the S251SMU33EP doesn't require an external power adapter when connected to an eSATAp (USB + eSATA combo) host port.

The 2.5in enclosure supports the fastest drive technologies including SATA III (6 Gbps), hybrid drives and solid state drives (SSD), saving you time by ensuring you're getting the most out of your drive performance. 

To ensure compatibility with your computer system, the S251SMU33EP supports all of the leading operating systems, including: Microsoft Windows®, Apple® OSX, Linux, and Google Chrome OS™.

The S251SMU33EP is backed by a StarTech.com 2-year warranty and free lifetime technical support.

Improved Performance with UASP

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.

UASP Speed Diagram

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

UASP Speed Diagram

Testing results were obtained using an Intel® Ivy Bridge system, a UASP-enabled StarTech.com Enclosure, and a SATA III solid state drive.

Applications

  • Take advantage of laptops and desktops that feature eSATA connectivity
  • Create a fast, portable external storage solution for Ultrabooks, laptops or Chromebooks
  • Add extra storage to any USB/eSATA-enabled computer system
  • Back up important data to an external storage device
  • Share large files between computers quickly and securely without a network connection
  • Retrieve data from your SATA drive, or turn your unused drive into additional external storage space

The StarTech.com Advantage

  • Versatile connectivity options, through either USB or eSATA/eSATAp
  • Maximum portability with a small footprint, and support for eSATAp (no external power adapter required)
  • Save time, with file transfers up to 70% faster than traditional USB 3.0 when used with a UASP-supported host

Partner Numbers

  • Ingram Micro Italy V933302
  • Esprinet Italy S251SMU33EP
  • Tech Data - Italy 4428480
  • UPC 065030859219

Compatibility

  • OS Independent logo
OS independent; No software or drivers required

Specifications

Warranty Information Warranty 2 Years
Connector(s) Drive Connectors 1 - SATA Data & Power Combo (7+15 pin)
Host Connectors 1 - Power eSATA (11 pin, eSATA/USB, 5V)
1 - USB 3.0 Micro-B (10 pin, SuperSpeed)
Environmental Operating Temperature 0°C to 40°C (32°F to 104°F)
Storage Temperature -10°C to 65°C (14°F to 149°F)
Humidity Operation Humidity: 10% ~ 90% RH
Storage Humidity: 5% ~ 95% RH
Hardware Interface eSATA
Bus Type USB 3.0 & eSATA
Interface USB 3.0
USB 3.0 & eSATA
Number of Drives 1
Drive Size 2.5in
Compatible Drive Types SATA
Drive Installation Fixed
Number of 2.5 inch bays 1
Fan(s) No
Chipset ID ASMedia - ASM1153E
ASMedia - ASM1456
Indicators LED Indicators 1 - Power/Activity
Packaging Information Package Height 42 mm [1.7 in]
Package Length 13.5 cm [5.3 in]
Shipping (Package) Weight 0.3 kg [0.6 lb]
Package Width 17.9 cm [7.0 in]
Performance Maximum Data Transfer Rate 6 Gbps - eSATA
5 Gbps - USB 3.0
Type and Rate USB 3.0 - 5 Gbit/s
UASP Support Yes
TRIM Support Yes
4Kn Support Yes
Type and Rate eSATA (6 Gbps)
Max Drive Capacity Currently tested with up to 2TB 7200 RPM hard drives
Physical Characteristics Weight of Product 98 g [3.5 oz]
Color Silver
Material Aluminum and Plastic
Max Drive Height 9.5
Product Length 12.5 cm [4.9 in]
Product Width 77 mm [3.0 in]
Product Height 1.6 cm [0.6 in]
Power Power Source USB-Powered
Plug Type H
Software OS Compatibility OS independent; No software or drivers required
Special Notes / Requirements Note Windows 7 and earlier Windows versions do not support TRIM with USB to SATA devices.
What's in the Box Included in Package 1 - USB 3.0/eSATAp 2.5" SATA Hard Drive Enclosure
1 - USB 3.0 Cable
1 - eSATA cable
1 - Installation screws (with screw driver)
1 - Phillips head screw driver
1 - USB to DC power adapter
1 - Instruction manual

Accessories

ESATA3

3 ft Shielded External eSATA Cable M/M

Connect your external SATA storage devices to your Laptop or desktop.

Your price
€7.99 EUR excl. VAT
€9.75 EUR incl. VAT
USB3AUB50CMB

0.5m (1.5ft) Black SuperSpeed USB 3.0 Cable A to Micro B - M/M

Connect a USB 3.0 Micro USB external hard drive to your computer

Your price
€9.99 EUR excl. VAT
€12.19 EUR incl. VAT
USB3AUB2MS

Slim Micro USB 3.0 Cable - M/M - 2m (6ft)

Position your USB 3.0 Micro devices near your desktop or laptop computer easily, with a thin, more flexible cable

Your price
€13.99 EUR excl. VAT
€17.07 EUR incl. VAT
USB3AUB1MS

Slim Micro USB 3.0 Cable - M/M - 1m (3ft)

Position your USB 3.0 Micro devices near your desktop or laptop computer easily, with a thin, more flexible cable

Your price
€11.99 EUR excl. VAT
€14.63 EUR incl. VAT
USB3CAUB1M

1m (3ft) Certified SuperSpeed USB 3.0 A to Micro B Cable - M/M

Connect your Micro-B USB 3.0 devices, with this high-quality USB 3.0 certified cable

Your price
€12.99 EUR excl. VAT
€15.85 EUR incl. VAT
USB3AUB15CMS

Slim Micro USB 3.0 Cable - M/M - 15cm (6in)

Minimize clutter and position your USB 3.0 Micro devices near your desktop or laptop computer easily, with a thin, flexible cable

Your price
€7.99 EUR excl. VAT
€9.75 EUR incl. VAT
USB3SAUB1

1 ft SuperSpeed USB 3.0 Cable A to Micro B

Connect a USB 3.0 Micro USB External Hard drive to your computer

Your price
€8.99 EUR excl.
€8.99 EUR incl.
USB3AUB50CMS

Slim Micro USB 3.0 Cable - M/M - 0.5m (20in)

Minimize clutter and position your USB 3.0 Micro devices near your desktop or laptop computer easily, with a thin, flexible cable

Your price
€9.99 EUR excl. VAT
€12.19 EUR incl. VAT
PEXESAT32

2 Port SATA 6 Gbps PCI Express eSATA Controller Card

Add Two eSATA 3.0 (6Gbps) Ports for High Speed Access to Large External Storage Solutions

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€43.99 EUR excl. VAT
€53.67 EUR incl. VAT
PEXESAT322I

2 Port PCI Express SATA 6 Gbps eSATA Controller Card - Dual Port PCIe SATA III Card - 2 Int/2 Ext

Add 2 external or internal SATA 6 Gbps ports to a computer, through a PCI Express slot

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PEXUSB3S25

2 Port PCI Express (PCIe) SuperSpeed USB 3.0 Card Adapter with UASP - LP4 Power

Add 2 SuperSpeed USB 3.0 ports to your PCI Express-enabled PC

Your price
€34.99 EUR excl. VAT
€42.69 EUR incl. VAT
PEXUSB3S4V

4 Port PCI Express PCIe SuperSpeed USB 3.0 Controller Card Adapter with UASP - SATA Power

Add 4 external USB 3.0 ports to a low profile or standard computer, through PCI Express

Your price
€58.99 EUR excl. VAT
€71.97 EUR incl. VAT
ESATAPLATE1

1 Port SATA to eSATA Slot Plate Bracket

Turn a standard SATA motherboard connection into an external eSATA port

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€5.99 EUR excl. VAT
€7.31 EUR incl. VAT
ESATAPLT18IN

18in 1 Port SATA to eSATA Plate Adapter

Turn a standard SATA motherboard connection into an external eSATA port

Your price
€6.99 EUR excl. VAT
€8.53 EUR incl. VAT
ESATAPLATE2

2 Port SATA to eSATA Slot Plate Bracket

Turn two standard SATA motherboard connections into two external eSATA ports

Your price
€6.99 EUR excl. VAT
€8.53 EUR incl. VAT
ESATAPLT2LP

2 Port Low Profile SATA to eSATA Plate Adapter

Add two eSATA ports to your PC, extended from internal Serial ATA connection ports

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€8.99 EUR excl. VAT
€10.97 EUR incl. VAT

Drivers/Downloads

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Manual(s):

Datasheet

Product Support

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Frequently Asked Questions

Troubleshooting

When you troubleshoot issues with a hard drive enclosure, there are some quick tests that you can complete to rule out potential problems. You can test to make sure that the following components are working correctly and are not the source of the issue:

  • Cables
  • Hard drives
  • Hard drive enclosure

To test your setup components, try the following:

  • Use the cables, hard drives, and hard drive enclosure in another setup to see if the problem is with the components or the setup.
  • Use a different cable, hard drive, and hard drive enclosure in your setup to see if the problem persists. Ideally, you should test a component that you know works in another setup.

When you test the hard drive and hard drive enclosure, it is recommended that you do the following:

  • To check Disk Management, press the Windows key + R, type diskmgmt.msc, and press Enter. Check to see if your hard drive is listed.
  • If the hard drive is listed with unallocated space, the hard drive needs to be reformatted. Right-click unallocated and click New Simple Volume. Follow the on-screen instructions to complete the reformatting.​

Note: Formatting a hard drive erases all of the data on it. Make sure that you back up all of your data before you reformat the hard drive.​

  • If the hard drive is listed as healthy but does not have a drive letter, for example, C:, right-click healthy and click Change Drive Letter and Paths. Click Add, assign a drive letter, and click OK.

Note: A formatted hard drive will not show up in Computer or My Computer until it has a drive letter assigned to it.

Before You Buy

To determine if your hard drive will work in this enclosure, on the product page, click the Technical Specifications tab, and do the following:

  • Make sure that the enclosure supports the storage size of your hard drive. If the storage size of your hard drive is larger than what the enclosure was tested with, the hard drive will likely still work with the enclosure.
  • Confirm that your hard drive uses the same interface type as the enclosure. For example, IDE, SATA, or M.2.
  • Make sure that the enclosure supports the physical size of your hard drive, such as 2.5 inches or 3.5 inches.
  • Make sure that the enclosure supports the height of your hard drive. For example, 9 mm or 15 mm.
  • Verify that the power consumption of your hard drive doesn’t exceed the power output of the enclosure. If you’re using multiple hard drives, make sure that the combined power consumption of all of the hard drives doesn’t exceed the power output of the enclosure.

Hard drive enclosures require power from your system's USB port. Although you can plug in any standard SATA drive, USB ports only supply a limited amount of power and are not able to power all of the hard drives plugged into the system.

The power capabilities of the USB port combined with the power requirements of the attached hard drive will determine if the hard drive enclosure will work in your setup. The power (in mA) supplied by the USB port must be greater than the requirements of the hard drive.

A USB 2.0 port can supply a maximum of 500 mA (0.5 A), and a USB 3.0 port can supply a maximum of 900 mA (0.9 A).

You can usually find the power requirements of your hard drive in the technical specifications on the label of the hard drive or on the manufacturer's website.

Compliance and safety

Compliance letters

Safety Measures

  • If product has an exposed circuit board, do not touch the product under power.
  • If Class 1 Laser Product. Laser radiation is present when the system is open.
  • Wiring terminations should not be made with the product and/or electric lines under power.
  • Product installation and/or mounting should be completed by a certified professional as per the local safety and building code guidelines.
  • Cables (including power and charging cables) should be placed and routed to avoid creating electric, tripping or safety hazards.
*Product appearance and specifications are subject to change without notice.

Customer Reviews

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(4 Stars)

Works great, but no eSATAp cable included

By: GeoffT - 05/27/2017
The drive works as expected with the exception that it doesn't come with an eSATAp cable which was the whole point of buying this product. It would have been nice to have it included or at least a somewhat prominent statement that it's not included so that I could have ordered it at the same time instead of waiting an additional week to to get my final solution.
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