Home » Internal Hard Drives and SSD

We're sorry, but this item is no longer for sale. However, there may be more Internal Hard Drives and SSD items available.

We recommend DIY KIT: OWC Express USB 2.0 2.5" Enclosure + 750GB WD Black 7200RPM HDD (Mfr P/N: OWCYWD7500BPKT) from Other World Computing for $75.75 as a suitable alternative.

OWC DIY Bundle:

750GB 2.5" Seagate 7200RPM 9.5mm HD,
OWC Express Silver Enclosure,
and OWC 5 Piece Toolkit

Mac / PC / USB 2.0 & 1.1
  • Mac
  • PC
  • USB
The Drive and Tools you need to Upgrade/Replace the existing 2.5" Drive in your laptop, Mac mini, Xbox, PS3, etc + make the drive being replaced an External for data transfer, backup, and/or additional portable storage.

Everything you need in one package, immediately ready to assemble and:
  • Backup and store your data with style and confidence.
  • Take your data with you - small enough to keep in a pocket!
  • Easily add additional laptop storage with no AC adapter required.
Examples of how this bus-powered Express bundle
can be used in real world situations:

Power Users / Travelers: Relocate your "home folder" to your Express and have your files with you at home, at work or on the road without the need to synchronize your machines.

Laptop Owners: Clone your current internal SATA hard drive in your laptop to the new drive. Then install the new, larger drive in your laptop and keep the smaller drive in your Express for additional storage space.

iTunes Aficionados: Keep a copy of your iTunes library on your external drive to play on multiple machines.

Gamers: Add additional storage to your XBox 360 or PS3 game console to store music, media, and other downloads. PS3 even includes a backup utility to protect your internal drive's data.

For Everyone: Have the piece of mind of a complete backup plan. Create a bootable clone of your hard drive at regular intervals so if your computer goes down, your productivity doesn't go down with it. Boot to another computer and keep on working!

Note: This enclosure is not designed for support of SSDs and recommended to used with 2.5" Hard Drives only.
*Bus powered via USB port on most computers, provided computer's bus supplies appropriate power needs.


Mercury Elite-AL Pro includes
  • OWC Express 2.5″ SATA Drive Enclosure
  • 750GB Seagate Momentus Hard Drive
  • OWC 5-Piece Mini Toolkit
    • Nylon Spudger
    • Phillips #00
    • Straight Blade 1.8mm
    • Torx T8
    • Torx T6
  • High Quality Double Shielded USB 2.0/1.1 (mini-B type) connecting cable
  • Express Installation Guide
  • Carrying sleeve
  • OWC 1 Year Solution Warranty with 48-Hour Turnaround Time


750GB Seagate Momentus Specifications:


Form Factor
2.5″ HDD
Formatted Capacity2
Rotational Speed
7,200 RPM
Cache / Data Buffer
Manufacturer Model Number
RoHS Compliant


Height (max)
9.5mm (0.370″)
Width (max)
69.85mm (2.75″)
Length (max)
100.35mm (3.951″)
Weight (typical)
115g (0.254 lbs.)
Data Heads
Number of Disks
Guaranteed Sectors
Bytes per Sector
Areal Density


MTBF (Mean Time Between Failures)
500,000 hours
Contact Start-Stops
Annual Failure Rate
Nonrecoverable Read Errors
1 per 1014 bits read
1 Year Seagate Warranty


Transfer Rate (Max)
Track-to-track Seek
Average Seek Time
Average Latency


Maximum Start Current, DC
1.0 Amp
Seek Power
2.5 Watts
Read Power
2.1 Watts
Write Power
2.3 Watts
Idle Mode
1.5 Watts
Idle Mode, Active
0.95 Watts
Idle Mode, Low Power
0.70 Watts
Standby Mode
0.15 Watts
Sleep Mode
0.15 Watts

Environmental (Operating)

350 G max at 2ms
1000 G max at 1ms
1000 G max at 0.5ms
Ambient Temperature (°F)
32°F to 140°F
Ambient Temperature (°C)
0°C to 60°C
2.0 G (0 to peak, 5-200 Hz)
1.0 G (0 to peak, 200-500 Hz)
Relative Humidity (non-condensing)
5% to 95%
-304.8 m to 3,048 m (-1,000 ft to 10,000+ ft)

Environmental (Non-Operating)

800 G max at 2ms
Ambient Temperature (°F)
-40°F to 158°F
Ambient Temperature (°C)
-40°C to 70°C
5 Gs (0 to peak, 5-500 Hz)
Relative Humidity (non-condensing)
5% to 95%
-304.8 m to 12,192 m (-1000 ft to 40,000+ ft)


Idle (Typical)
2.3 bels
Seek (Typical)
2.6 bels
  1. 1GB = 1,000,000,000 bytes. Total accessible capacity varies depending upon operating environment (typically 5-10% less). The actual total capacity will depend on your own defined file settings/preferences.
  2. In terms of standard gigabytes, 1GiB ≈ 1.074GB and refers to the actual formatted capacity of shown under Mac OS 10.5 or earlier and Microsoft Windows OS.
  3. Specific application environments such as temperature and duty cycle will affect the overall reliability rates.

OWC Express Specifications:


  • Jmicron 20329 USB 2.0 chipset

Interfaces Supported

  • USB 2.0 / 1.1 Backwards compatible

Port Configuration

  • USB 2.0 - (1) mini "B" port

Max Data Transfer Rate

  • USB 2.0 - 480Mbps (or 60MB/sec)

Port/Interface Bootability

    Can I use this solution as an external startup drive?
  • USB 2.0: Supported on Macs and PC's meeting minimum requirements. - Click for more info

System Requirements

  • Macintosh: Macintosh running OS 8.6 to 9.2.2, OS X 10.2.x or later including 'Mountain Lion' 10.8.x, and an available USB port. Time Machine® Compatible: Mac OS X 10.5 (version introduced) and later.
  • PC: Windows 8, 7, Vista, XP, 2000, NT, 98, and an available USB port.
  • Linux: Linux compatible via supported the USB interface.


  • Super quiet fanless ventilation

Power Supply

  • Bus Power via USB on all models with USB 2.0 port

Drive Requirements

  • Any 2.5" Serial-ATA Hard Drive up to 9.5mm height. Not recommended for Solid State Drives.

External Case Dimensions

  • 3.07 in (W) x 5.12 in (D) x 0.55 in (H)

Enclosure Weight (no accessories)

  • 2.0 ounces (56g)

Product Manual

Operating Environment:


  • Dependent on mechanism installed

Relative Humidity

  • Dependent on mechanism installed


  • Dependent on mechanism installed


  • Dependent on mechanism installed


OWC 1 Year Solution Warranty

The best warranty is one you never have to use, but should the need occur - OWC is proud to provide a superior level of support and warranty coverage to our customers. Even when not used, we understand the peace of mind afforded by a longer warranty period. OWC's industry leading coverage is a testament to our confidence in the reliability of the solutions that we offer. OWC solutions are engineered to demanding quality standards in order to deliver the most reliable, highest performance available on the market in each storage category.

View more information about the OWC 1 Year Solution warranty

Manufacturer provided specifications for Seagate p/n OWCYST9750420AS

Customer Ratings

Write a Review 4.3 / 5 6 out of 9 (67%) reviewers would recommend this product
Verified Buyer
Reviewer: dysamoria Location: Coplay, PA Age: 35-44 Experience Level: IT Professional Owned Product: over 6 months
Rating: 5/5 Going strong since purchase, only replaced by SSD May 31, 2017 I never wrote a review here for this purchase. I never thought to. So when OWC suggested I review my recent purchase, I thought I would review this one too.

It was an excellent purchase. Exactly what I needed. The drive itself has been going without incident from day one. I've only taken it out of service to try to speed up the MacBook with an SSD (also purchased here but not on my account, so I can't review it, but so far so good).

I would recommend this item to a friend! Customer Videos:

Verified Buyer
Reviewer: Anonymous Location: Naples, Fl Age: 18-24 Experience Level: Home User Owned Product: over 6 months
Rating: 5/5 Awesome!!! April 15, 2013 Needed to upgrade my hard drive and I was recommended to Mac Sales. It was not too expensive and I really enjoyed the fact that they sent me all the tools I needed to be able to change my hard drive. It arrived in great condition & fast. Checkout was also very easy & efficient. Overall I enjoyed my shopping experience & my new hard drive.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: Scott Depot WV Age: 45-54 Experience Level: IT Professional Owned Product: less than a month
Rating: 5/5 Great Product! March 24, 2013 Bought this for my 2006 Macbook Pro.Installation went without a hitch. The old Macbook Pro has plenty of room now.

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous
Rating: 2/5 Cheap but not reliable February 12, 2013 The HD has been running just fine for about a month until I noticed it slowing down. I'm simply opening folders and deleting files and get the wheel of death for about 2-3 seconds. That's scary. It's worth spending a bit more.

Verified Buyer
Reviewer: pelimage Location: Austin, TX Age: 45-54 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 These are great, will buy more September 20, 2012 good, reliable, fast, works

I would recommend this item to a friend!

Verified Buyer
Reviewer: Anonymous Location: McAllen, TX Age: 25-34 Experience Level: IT Professional Owned Product: less than a month
Rating: 5/5 Easy to install and works great! July 19, 2012 This is a great product. It comes with all the tools necessary to upgrade your HD. The instructions are clear and if you get stuck, there's some great videos that can show you step by step how to upgrade your HD.

I was hesitant to purchase the product after reading reviews on the loudness of the drive and the OWC Express 2.5 being of bad quality. After receiving the items, I am extremely satisfied with both. I actually think my old drive was louder. I can barely hear it or feel it. The OWC Express is a great option for the price!! It protects the spare drive and it is small enough to carry around everywhere you go! I will highly recommend and I'm also looking forward to my next upgrade!!

I would recommend this item to a friend!

Verified Buyer
Reviewer: MacProLover Location: NC Age: 25-34 Experience Level: Power User Owned Product: over 6 months
Rating: 2/5 Failed! January 24, 2012 Drive lasted less than a year..about 10 months and then completely failed. Can't boot, reformatting was a no-go, nothing! Glad I back up regularly! Not pleased. Now to get with Seagate regarding warranty info..

Response from MacSales.com, Technical Support January 25, 2012 As the saying goes, it's not a matter of *if* your hard drive will fail - it's *when* you hard drive will fail - so we're happy to hear that you backup regularly. Lucky for you, the drive is still under warranty and Seagate is usually pretty speedy with their warranty exchanges. You can contact them via telephone at 1(800) SEA-GATE or via their website here: http://www.seagate.com/www/en-us/support/
Verified Buyer
Reviewer: Scott
Rating: 5/5 Very quick and easy to use October 4, 2011 It took no time at all to get the old drive replaced. New drive has been running fine for months.

Verified Buyer
Reviewer: JimR Location: Elkhorn, NE Age: 55-65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Easy Install, Great Service April 1, 2011 The 500 GB, 5400 RPM Seagate that came from Apple in my Mid-2010 MacBook Pro was filling. I replaced it with this drive. The external enclosure (with USB 3, no less) to house the "old" drive and the toolkit was an added bonus. The swap was quick and easy. OWC's service was excellent. -JR

I would recommend this item to a friend!

OWC DIY Bundle: 750GB 2.5" Seagate 7200RPM 9.5mm HD, OWC Express Silver Enclosure, and OWC 5 Piece Toolkit Mfr P/N: OWCYST9750420AS OWC SKU: OWCYST9750420AS SATA Enclosure Kit with Seagate Drive & 5 piece toolkit. Seagate 1 Year Limited Warranty
Sold Out