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OWC Mercury
On-The-Go® Pro

500GB 7200 RPM
USB 3.0 & 2.0 Storage Solution

Mac / PC / USB 3.0 & 2.0
  • Mac
  • PC
  • USB 3.0
The OWC Mercury On-The-Go USB 3.0 & 2.0 Storage Solution provides maximum storage in an ultra-portable, totally bus powered design!
Stylishly engineered in a sleek, impact-resistant acrylic enclosure, the Mercury On-The-Go Pro incorporates shock-isolation technology to give maximum protection for your precious data inside. The Mercury On-The-Go Pro is a true must-have for users like you who are seeking High-Performance and Highly Reliable storage weighing less than 11 ounces and that is small enough to fit in your pocket.
Outstanding Features
Compact and Versatile
If you're looking for one of the most compatible mass storage solutions made, look no further! The OWC Mercury On-The-Go drive is all you'll need! The OWC Mercury On-The-Go has what it takes to truly work cross platform. The Mercury On-The-Go Pro is bus-powered, so it doesn't require an AC adapter!
Cool and Silent
The OWC Mercury On-The-Go's fanless design offers near silent operation while still keeping your drive cool. The built-in aluminum heatsink underneath the drive and passthrough cooling vents on the top of the case work in tandem to provide optimum results. 
SuperSpeed Ready, Yet Backward Compatible
The OWC Mercury On-The-Go can be used with any Macintosh or PC with a USB 3.0 & 2.0 port. Now you can have SuperSpeed performance up to 500MB/s and compatibility with legacy machines!

Includes

  • OWC Mercury On-The-Go Pro USB 3.0 & 2.0 storage solution
  • High Quality Double Shielded USB 3.0 & 2.0 certified connecting cable
  • Carrying Case
  • Assembly Manual & User Guide

Gallery

Product Specifications:

Bus Interface

  • USB 3.0 & 2.0 Backwards compatible port.

Chipset

  • ASMedia 1051e USB 3.0 chipset

Standard Mechanism

    500GB HGST Travelstar™ Z7K500 Specifications:

    Specifications

    Form Factor
    2.5″ HDD
    Interface
    SATA 6.0Gb/s
    Capacity1
    500GB
    Formatted Capacity2
    465GiB
    Rotational Speed
    7,200 RPM
    Cache / Data Buffer
    32MB
    Manufacturer Model Number
    HTS725050A7E630
    Format

    Physical

    Height (max)
    7mm (0.275″)
    Width (max)
    69.85mm (2.750″)
    Length (max)
    100.35mm (3.951″)
    Weight (typical)
    95g (0.209 lbs.)
    Bytes per Sector
    512
    Areal Density
    630Gb/in2

    Reliability3

    Contact Start-Stops
    600,000
    Warranty
    3 Year HGST Warranty

    Performance

    Transfer Rate (Max)
    600MB/s
    Track-to-track Seek
    1.0ms
    Average Seek Time
    13.0ms
    Average Latency
    4.2ms

    Power

    Maximum Start Current, DC
    5.5 Watts
    Seek Power
    2.1 Watts
    Read Power
    1.8 Watts
    Write Power
    1.8 Watts
    Idle Mode
    1.7 Watts
    Idle Mode, Active
    1.0 Watts
    Idle Mode, Low Power
    0.8 Watts
    Standby Mode
    0.2 Watts
    Sleep Mode
    0.1 Watts

    Environmental (Operating)

    Shock
    400 G max at 2ms
    Ambient Temperature (°F)
    32°F to 140°F
    Ambient Temperature (°C)
    0°C to 60°C
    Altitude
    -304.8 m to 3,048 m (-1,000 ft to 10,000+ ft)

    Environmental (Non-Operating)

    Shock
    1000 G max at 1ms
    Ambient Temperature (°F)
    -40°F to 149°F
    Ambient Temperature (°C)
    -40°C to 65°C
    Altitude
    -304.8 m to 12,192 m (-1000 ft to 40,000+ ft)

    Acoustics

    Idle (Typical)
    2.3 bels
    Seek (Typical)
    2.4 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.
  • 500GB* HGST Travelstar™ Z7K500 Hard Disk Drive**

  • *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.

    **OWC reserves the right to replace or upgrade to equivalent or better components.

Drive Interface

  • SATA (Serial ATA) Revision 3.0

Drive Cache Size

  • 16 Megabyte (16,384k)

Drive Rotation Speed

  • 7200RPM

Max Data Transfer Rate

  • USB 3.0 – 500MB/s
  • USB 2.0 – 60MB/s

Port/Interface Bootability

  • Can I use this solution as an external startup drive?
  • USB 3.0: Supported on Macs and PC's meeting minimum requirements. - Click for more info
  • USB 2.0: Supported on Macs and PC's meeting minimum requirements. - Click for more info

UASP (USB Attached SCSI Protocol) Compliant

  • Yes

Format

System Requirements

  • Macintosh: Macintosh OS 8.6 to 9.2.2, OS X 10.2.x or later including 'Mavericks' 10.9.x, and an available USB 3.0 port. Time Machine® Compatible: Mac OS X 10.5 (version introduced) and later.
  • PC: Windows Vista, XP, 2000, NT, 98, and an available USB 3.0 port.
  • Linux: Linux compatible via supported the USB interface.

Power Supply*

  • Bus power via USB on most computers with factory installed USB 2.0 or USB 3.0 port
  • Optional AC Adapter* (available as a separate purchase here)

  • * AC adapter not required for most applications provided computer bus supplies appropriate power needs.

External Case Dimensions

  • 3.5" (W) x 5.5" (D) x 1" (H)
  • 88.9mm x 139.7mm x 25.4mm

Enclosure Weight (no accessories)

  • 0.67lbs. (0.30kg)

User Guide

Recommended USB 3.0 Cards

Operating Environment:

Temperature

  • (operating) 5°C – 42°C (41°F – 107°F)
  • (non-operating) -40°C – 65°C (-40°F – 149°F)

Relative Humidity

  • (operating) 8% – 90% RH (Non-condensing)
  • (non-operating) 5% – 95% RH (Non-condensing)

Shock

  • (operating) 70G 2mS;
  • (non-operating) 175G 2mS

Vibration

  • (operating) 1.0G (5 – 300Hz)
  • (non-operating) 5.0G (5 – 500Hz)

MTBF

  • More than 300,000 power-on hours

Load/Unload Cycles

  • 600,000
Manufacturer provided specifications for Other World Computing p/n MSU37500GB16 UPC#: 812437020489

Benchmarks

Click any of the benchmarks below to view the results.

Customer Ratings

Write a Review 4.8 / 5 191 out of 205 (93%) reviewers would recommend this product
1 2 3 4 5
Verified Buyer
Reviewer: Macsolvers Location: San Francisco Bay Area Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Was able to put to use quickly October 28, 2018 I have installed 2.5 inch drives in several of these enclosures before, and this one was just as easy to assemble. I am using the drive enclosure as a supplemental backup system.

I would recommend this item to a friend! This review is from OWC Mercury On-The-Go Pro 2.5" Portable USB 3.0 Enclosure for SATA NoteBook HDs. Customer Videos:

Verified Buyer
Reviewer: Jackbudz Location: Bellerose Manor,NY Age: Over 65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Quality product October 26, 2018 Own three of these and use as backup drives for three Macs. Have been a customer for over 15 years. Have purchased ssd’s,external burners and older hd external drives that still work,but not as quick as the ssd external drives I now have. OWC product line is superb. It covers the gamut of anything you might need. Tech support is outstanding. The diy videos are easy to follow. Dealing with OWC is a pleasure! I would also add their installation service. 4 years ago they added a data doubler plus a ssd to my 2012 macmini. Needless to say. That macmini is my go to Mac for doing taxes etc. The original drive is the backup. All my important stuff lives in it. Still use an external just in case. CC Cleaner installed.

I would recommend this item to a friend! This review is from 250GB SSD OWC Mercury On-The-Go Pro USB 3.0 / 2.0 SSD Portable Bus Powered Solution.. Customer Videos:

Verified Buyer
Reviewer: Corvus Location: Longmont, CO Age: 55-65 Experience Level: Home User Owned Product: 3-4 months
Rating: 5/5 Great External Drives for Backup and Storage September 18, 2018 I've now purchased several of these for various uses, and they all work great! The spinning drives are fast, work off bus power (with USB 3.0) so no extra cords, and take up very little space. I use the Mercury On-The-Go spinning drives for what I term "relocatable" applications. That is, I want to be able to easily take it with me to use in a hotel room, or in our RV, but it doesn't need the durability and "use on the move" capability of a SSD. The spinning drives are high quality, and relatively cheap (compared to a like-sized SSD), so I don't mind some overlap or duplication. In fact, if you're not moving big data files around, the 5400 rpm drives are really a steal. I have several of the On-The-Go Pro drives, both SDD and HDD, that I use with my MBP since it's a bit limited on storage with 256G SSD built in. So, I've pretty much eliminated data storage on the laptop and just use that SSD for applications, and then I keep all the data (e.g., pictures, GIS data, audio files, etc... on the external drives. A nice extra is that I have a dedicated Photos HDD that has my Lightroom library on it, and I can take it with me on a trip, work with the photos on the laptop, and then when I get home, use the same drive on my desktop for work and finishing on a bigger screen. It's working great, and I even have a separate drive that I use as my Windows 10 gaming drive. The price, size and performance of these OWC Mercury On-The-Go drives are perfect for this type of use.

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

Verified Buyer
Reviewer: Corvus Location: Longmont, CO Age: 55-65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Perfect Win 10 external drive August 12, 2018 The 256G SSD on my MBP was maxed out with a Bootcamp partition. After reading a Rocket Yard blog article on setting up Windows to boot from an external USB drive, I didn't wait long to select this OWC 120G SSD portable to do my install. It's PERFECT!! The drive is small, tidy (USB 3.0 bus power, no power cords!), and FAST. And, the SSD is bump and jostle resistant, so I can use it on the go. I was able to remove the Bootcamp partition on the internal drive and get all the space back. The external boot operates with no perceptable performance loss (the Win 10 OS and drive are for games). I have a couple other ext HDDs that I use for backups and pictures, but I really appreciate the additional ruggedness of the SSD. The OWC enclosure is rugged (enough), takes little desktop space, and fits neatly in a laptop bag. It fits my needs perfectly, and has been running without a hiccup.

I would recommend this item to a friend! This review is from 120GB SSD OWC Mercury On-The-Go Pro USB 3.0 / 2.0 SSD Portable Bus Powered Solution.. Customer Videos:

Verified Buyer
Reviewer: djcl Location: Los Angeles, CA Age: 45-54 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Great Little Drive June 18, 2018 This is my fourth OWC on the go pro drive. They are solid workhorses. my oldest is 9 years old and still chugging. I have only ever had one problem with a drive but didn't lose data just a power issue. it was just outside the three year warranty but OWC still repaired it free of charge. You can't beat that for reliability and customer service. So, yes, I highly recommend these drives.

I would recommend this item to a friend! This review is from 2.0TB OWC Mercury On-The-Go Pro USB 3.0 / 2.0 5400RPM Portable Bus Powered Solution.. Customer Videos:

Verified Buyer Top 100 Contributor
Reviewer: TheRetiredViking Location: Tri-Cities area TN Age: Over 65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 As good as before June 7, 2018 I bought one of these several years back; I am glad to see the product has not been cheapened. It is easy to use, and seems sturdy.

This review is from OWC Mercury On-The-Go Pro 2.5" Portable USB 3.0 Enclosure for SATA NoteBook HDs. Customer Videos:

Verified Buyer Top 100 Contributor
Reviewer: StumpJumper Location: Ohio Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Another great mobile HDD June 7, 2018 This external HDD replaced an older one that is used to back up my wife's 2008 Macbook Pro which experienced a major internal failure last month. The old drive had worked flawlessly but its interface wasn't compatible with the USC-C ports on my wife's new 2018 MBP. The new drive has been working just as flawlessly so far, and I expect it to continue to do so.

I would recommend this item to a friend! This review is from 1.0TB OWC Mercury On-The-Go Pro USB 3.0 / 2.0 7200RPM Portable Bus Powered Solution.. Customer Videos:

Verified Buyer Top 250 Contributor
Reviewer: brushworks Location: Indiana Age: 55-65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Best Product of Its Kind April 22, 2018 These little drive enclosures are the best I've ever used. Strong, sturdy and durable to the extreme. Provides superb shock protection for even "old-fashioned" mechanical hard drives. They cost a little more than a lot of other enclosures, but they're worth every penny. And they look so good! I plan to buy more as gifts for my kids and grandkids.

I would recommend this item to a friend! This review is from OWC Mercury On-The-Go Pro 2.5" Portable USB 3.0 Enclosure for SATA NoteBook HDs. Customer Videos:

Verified Buyer
Reviewer: mrr714 Location: new castle, de Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 great SSD Drive April 15, 2018 Good speed, right size - decent price. Like the enclosure.

I would recommend this item to a friend! This review is from 1.0TB SSD OWC Mercury On-The-Go Pro USB 3.0 / 2.0 SSD Portable Bus Powered Solution.. Customer Videos:

Verified Buyer
Reviewer: Austin Location: Cupertino, CA Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 Used w/ SSD as offsite backup. March 22, 2018 Easily installed an SSD into the enclosure. Very fast w/ USB3. Small enough to fit in my fire safe. Has worked well over the years.

I would recommend this item to a friend! This review is from (*) OWC Mercury On-The-Go 2.5" Portable USB 3.0 Enclosure for SATA NoteBook HDs. Customer Videos:

Verified Buyer
Reviewer: PapPap Location: Michigan Age: Over 65 Experience Level: Home User Owned Product: over 6 months
Rating: 5/5 Great backup and archive solution December 30, 2017 Grandson used his MacBook Pro with Retina for two and a half years of college. His small solid state drive was nearly full and cooling fan was running regularly. He had no external drive and no backup plan! This drive was a great solution at a very reasonable cost. Created two partitions, archive and backup. We moved seldom used files to archive and set up Time Machine for backups. This simple addition will keep his 8 gig, 120 Gig SSD MacBook relevant for the foreseeable future at a very reasonable cost. Thank you Macsales!

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

Verified Buyer
Reviewer: jwarren Location: Hansville WA Age: Over 65 Experience Level: Power User Owned Product: over 6 months
Rating: 5/5 LOVE these pocket-sized multi-terabyte storage units December 16, 2017 I've been using these OWC On-The-Go external drives since at least 2012, and love 'em! Have [at least] 18 of 'em - 500GB to 2TB; most USB2/USB3; some Firewire400-800/USB2or3. Something like 20-30 TERAbytes in total. Got most of 'em with the mass-store already inside, but also got a few 0GB cases and stuffed my own drives in 'em (usually extracted from obsolete computers on the way to recycling). Nightly backups (using wun'erful Carbon Copy Cloner); off-site back-ups; easy sharing of monster-sized files; etc. [Well okay - so maybe it has to be a slightly largeish pocket. :-) ]

I would recommend this item to a friend! This review is from 2.0TB OWC Mercury On-The-Go Pro USB 3.0 / 2.0 5400RPM Portable Bus Powered Solution.. Customer Videos:

Verified Buyer
Reviewer: TommyZ Location: Long Beach CA Age: 45-54 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Compact/Fast July 5, 2017 A nice little portable package, that's faster than most portable HDs. One potential issue I've had is with connecting it to a hub. It "clicks" and won't fire up when attached to one of my powered USB 3 hubs. It must be a power issue as the drive works great when connected directly to the MacPro and Powerbook. Could be a hub issue, though other peripherals are working, so I'm not sure it's that the drive's power requirements are a bit steeper than the hub can handle.

I would recommend this item to a friend! This review is from 1.0TB OWC Mercury On-The-Go Pro USB 3.0 / 2.0 7200RPM Portable Bus Powered Solution.. Customer Videos:

Verified Buyer
Reviewer: Rhenig Location: Paris, France Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Reassuring Solid Construction July 5, 2017 Anyone already having bought this item will know the merits of this transparent acrylic casing. For a first time purchase, it may be an act of faith. However, on installing the disk and reasembling, one is totally reassured as to its robustness, the more so when copying files. It performs well. All in all, a highly satisfying acquisition.

I would recommend this item to a friend! This review is from OWC Mercury On-The-Go Pro 2.5" Portable USB 3.0 Enclosure for SATA NoteBook HDs. Customer Videos:

Verified Buyer
Reviewer: Jody Location: New Bern, NC Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 4/5 Good price, rapid shipping, great product. June 23, 2017 This is the fourth Mercury On-The-Go drive I have bought from MacSales. The compact size, the bus-powered operation, the included cable, and the convenient carrying case all make this very useful. Setup is a snap -- I was making a backup a half hour after opening the shipping carton.

I would recommend this item to a friend! This review is from 1.0TB OWC Mercury On-The-Go Pro USB 3.0 / 2.0 7200RPM Portable Bus Powered Solution.. Customer Videos:

Verified Buyer
Reviewer: Vinnny Location: Chestnut Ridge, NY Age: Over 65 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Good Time Machine drive June 11, 2017 I like the fact that it has a power switch.

I would recommend this item to a friend! This review is from 500GB OWC Mercury On-The-Go Pro USB 3.0 / 2.0 5400RPM Portable Bus Powered Solution.. Customer Videos:

Verified Buyer
Reviewer: KenW Location: Asheville, NC Age: Over 65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Works great, but... June 4, 2017 I purchased this 0GB enclosure when we came to the conclusion that my older 1GB On-The-Go-Pro hard drive enclosure had failed while the hard drive itself was in good condition. The diagnosis of MacSales Support proved to be correct and I now have a functioning external hard drive. However, the latest version of the 0GB enclosure is slightly different that the original and the included instructions are directed toward a newer SSDs. My advice is to contact OWC/MacSales for help if you're installing an older mechanical hard drive in this enclosure. Other than that, the new enclosure performs flawlessly.

I would recommend this item to a friend! This review is from OWC Mercury On-The-Go Pro 2.5" Portable USB 3.0 Enclosure for SATA NoteBook HDs. Customer Videos:

Verified Buyer
Reviewer: Howie Age: Over 65 Experience Level: Power User Owned Product: less than a month
Rating: 5/5 Great June 4, 2017 Perfect as usual

I would recommend this item to a friend! This review is from 1.0TB OWC Mercury On-The-Go Pro USB 3.0 / 2.0 7200RPM Portable Bus Powered Solution.. Customer Videos:

Verified Buyer
Reviewer: davidah1 Location: San Francisco CA Age: 55-65 Experience Level: Home User Owned Product: less than a month
Rating: 4/5 works fine, as it should May 22, 2017 What is there to say? It works.

I would recommend this item to a friend! This review is from 1.0TB SSD OWC Mercury On-The-Go Pro USB 3.0 / 2.0 SSD Portable Bus Powered Solution.. Customer Videos:

Verified Buyer
Reviewer: AgileJim Location: Connecticut Age: 45-54 Experience Level: IT Professional Owned Product: 1-3 months
Rating: 5/5 Plug and Play; Fast April 28, 2017 I bought this drive to backup a new machine I purchased. It was recognized quickly when plugged into the computer and the initial set-up was simple and straightforward. I am satisfied with the speed of the drive.

I would recommend this item to a friend! This review is from 1.0TB OWC Mercury On-The-Go Pro USB 3.0 / 2.0 7200RPM Portable Bus Powered Solution.. Customer Videos:

Verified Buyer
Reviewer: KartRacer48 Location: Ohio Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Great HD for the small size April 16, 2017 This is my 4th OWC on the go 7200 RPM hard drive. I travel with these and bus power works great too.

I would recommend this item to a friend! This review is from 1.0TB OWC Mercury On-The-Go Pro USB 3.0 / 2.0 7200RPM Portable Bus Powered Solution.. Customer Videos:

Verified Buyer
Reviewer: jeremy284 Location: 38632 Age: 55-65 Experience Level: Home User Owned Product: less than a month
Rating: 5/5 Great little enclosure for spare hard drives April 3, 2017 I have half a dozen of these enclosures now to do backups, store photos and music libraries. A great product and very reliable.

I would recommend this item to a friend! This review is from OWC Mercury On-The-Go Pro 2.5" Portable USB 3.0 Enclosure for SATA NoteBook HDs. Customer Videos:

Verified Buyer Top 100 Contributor
Reviewer: StumpJumper Location: Ohio Age: Over 65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 Small, Light, Convenient & Reliable April 2, 2017 This is the second Mercury On-The-Go Pro that I've purchased from OWC/MacSales.com. I use them for clone backups of our two MacBook Pro's, usually weekly, to supplement the normal hourly Time Machine backups to other external drives (Mercury Elite Pro's or MiniStacks). We've been using the older On-The-Go Pro for over 5 years now. These drives are light weight and easily transportable along with a laptop computer's other necessary gear. Being USB bus powered (the older one is powered through the FireWire 800 connection) you don't have to lug around an additional power brick.

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

Verified Buyer
Reviewer: DustyMac Location: Washington DC Age: 55-65 Experience Level: Power User Owned Product: 1-3 months
Rating: 5/5 Great Enclosure March 31, 2017 This is my fourth or fifth of these enclosures bought from OWC. This one was to resurrect the hard drive from my dead 2011 MacBook Pro. As always, installation was easy and my old drive works great. If I have any criticism, it's the brightness of the blue LED activity light, but a piece of label tape dims it quite nicely.

I would recommend this item to a friend! This review is from (*) OWC Mercury On-The-Go 2.5" Portable USB 3.0 Enclosure for SATA NoteBook HDs. Customer Videos:

Verified Buyer
Reviewer: MacBeil Location: Kamloops, B.C. Age: 55-65 Experience Level: Home User Owned Product: 1-3 months
Rating: 5/5 This product is cool March 25, 2017 I bought this enclosed to hold my Laptop drive that I was changing out with a 2 T drive. The old drive just slid right in and was up and running in min's. I might try the enclosed with the Thunderbolt port to compare the speeds.

I would recommend this item to a friend! This review is from OWC Mercury On-The-Go Pro 2.5" Portable USB 3.0 Enclosure for SATA NoteBook HDs. Customer Videos:

OWC 500GB 7200RPM OWC On-The-Go® Pro Mfr P/N: MSU37500GB16 OWC SKU: OWCMSU37500GB16 USB 3.0 & 2.0 Storage Solution 3 Year OWC Limited Warranty Ships: Same Day
Supply Limited: 4 available
only $94.99
Add to CartOther World Computing MSU37500GB16 In Stock, Click to Buy Now
Additional Capacities & Kits: 5400 RPM HDD
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7200 RPM HDD
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Add Your Own Drive
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SSD Models
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